SIST EN ISO 14091:2021

Adaptation to climate change - Guidelines on vulnerability, impacts and risk assessment (ISO 14091:2021)

This document gives guidelines for assessing the risks related to the potential impacts of climate change. It describes how to understand vulnerability and how to develop and implement a sound risk assessment in the context of climate change. It can be used for assessing both present and future climate change risks.
Risk assessment according to this document provides a basis for climate change adaptation planning, implementation, and monitoring and evaluation for any organization, regardless of size, type and nature.

Anpassung an den Klimawandel - Vulnerabilität, Auswirkungen und Risikobewertung (ISO 14091:2021)

Dieses Dokument gibt Leitlinien für die Bewertung der mit den möglichen Auswirkungen des Klimawandels verbundenen Risiken vor. Es beschreibt, wie Vulnerabilität zu verstehen und wie eine fundierte Risikobewertung im Kontext des Klimawandels zu entwickeln und umzusetzen ist. Es kann für die Bewertung sowohl gegenwärtiger als auch zukünftiger Risiken des Klimawandels herangezogen werden.
Risikobewertungen nach diesem Dokument bieten eine Grundlage für die Planung der Anpassung an die Folgen des Klimawandels sowie für die Umsetzung, das Monitoring und die Evaluierung für jedwelche Organisation, unabhängig von Größe, Art und Wesen.

Adaptation au changement climatique - Lignes directrices sur la vulnérabilité, les impacts et l'évaluation des risques (ISO 14091:2021)

This document gives guidelines for assessing the risks related to the potential impacts of climate change. It describes how to understand vulnerability and how to develop and implement a sound risk assessment in the context of climate change. It can be used for assessing both present and future climate change risks.
Risk assessment according to this document provides a basis for climate change adaptation planning, implementation, and monitoring and evaluation for any organization, regardless of size, type and nature.

Prilagoditev podnebnim spremembam - Smernice za oceno ranljivosti, vpliva in tveganja (ISO 14091:2021)

General Information

• Status: Published
• Public Enquiry End Date: 16-Feb-2020
• Publication Date: 23-Mar-2021
• ICS: 13.020.30 - Environmental impact assessment
• ICS: 13.020.40 - Pollution, pollution control and conservation
• Technical Committee: UZO - Environmental management
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 18-Feb-2021
• Due Date: 25-Apr-2021
• Completion Date: 24-Mar-2021
• Ref Project: EN ISO 14091:2021 - Adaptation to climate change - Guidelines on vulnerability, impacts and risk assessment (ISO 14091:2021)

Overview

EN ISO 14091:2021 - Adaptation to climate change: Guidelines on vulnerability, impacts and risk assessment (ISO 14091:2021) provides structured guidance for assessing risks from current and future climate change. Published by CEN/ISO TC 207, the standard explains how to understand vulnerability, identify climate-driven impacts, and develop robust climate change risk assessment processes that support adaptation planning, implementation, monitoring and evaluation for any organization, regardless of size or sector.

Key topics

• Risk concept and assessment approaches: Explanation of climate-change-specific risk concepts and the use of screening assessments and impact-chain approaches for qualitative and quantitative evaluation.
• Preparing assessments: Establishing context, defining objectives, team setup, scope and time horizons, data gathering and transparency.
• Impact chains and screening: Methods to screen impacts and develop impact chains to link climatic drivers to outcomes.
• Indicators and data: Selecting indicators, creating indicator lists, acquiring, evaluating and managing data; guidance on data quality and aggregation.
• Adaptive capacity: Assessing adaptive capacity and integrating non-climatic factors into risk evaluation.
• Analysis and interpretation: Aggregating risk components, interpreting findings, analysing cross-sectoral interdependencies and addressing uncertainty.
• Governance and communication: Reporting requirements, stakeholder participation, independent review and communicating results to support adaptation planning.
• Annexed practical material: Informative annexes with examples (impact chains, screening matrices, sample indicators, aggregation methods and adaptive-capacity components).

Practical applications

EN ISO 14091:2021 is designed to deliver practical value across planning and operational contexts:

• Use for climate adaptation planning at organizational, project or regional levels.
• Inform infrastructure resilience assessments (e.g., transport, water, energy).
• Guide risk-informed decision-making for urban planners, asset owners, supply-chain managers and insurers.
• Support monitoring & evaluation frameworks for adaptation measures and policies.
• Provide a repeatable framework for screening vulnerabilities when budgets or data are limited, or for comprehensive impact-chain analyses when resources allow.

Who should use this standard

• Environmental and risk managers, adaptation planners and sustainability teams
• Public authorities and policy makers involved in climate resilience
• Consultants, engineers and urban planners conducting vulnerability and impact assessments
• NGOs, infrastructure operators and private-sector organizations needing a standardized risk-assessment basis

Related standards and context

EN ISO 14091:2021 is developed under ISO/TC 207 (Environmental management) and complements environmental management and climate-related guidance within the ISO family. National adopters may publish endorsed national versions (CEN members).

Keywords: EN ISO 14091:2021, climate change risk assessment, vulnerability assessment, adaptive capacity, impact chains, climate adaptation planning.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2021
Prilagoditev podnebnim spremembam - Smernice za oceno ranljivosti, vpliva in
tveganja (ISO 14091:2021)
Adaptation to climate change - Guidelines on vulnerability, impacts and risk assessment
(ISO 14091:2021)
Anpassung an den Klimawandel - Vulnerabilität, Auswirkungen und Risikobewertung
(ISO 14091:2021)
Ta slovenski standard je istoveten z: EN ISO 14091:2021
ICS:
13.020.30 Ocenjevanje vpliva na okolje Environmental impact
assessment
13.020.40 Onesnaževanje, nadzor nad Pollution, pollution control
onesnaževanjem in and conservation
ohranjanje
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 14091
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2021
EUROPÄISCHE NORM
ICS 13.020.30; 13.020.40
English Version
Adaptation to climate change - Guidelines on vulnerability,
impacts and risk assessment (ISO 14091:2021)
Adaptation au changement climatique - Lignes Anpassung an den Klimawandel - Vulnerabilität,
directrices sur la vulnérabilité, les impacts et Auswirkungen und Risikobewertung (ISO 14091:2021)
l'évaluation des risques (ISO 14091:2021)
This European Standard was approved by CEN on 29 January 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14091:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 14091:2021) has been prepared by Technical Committee ISO/TC 207
"Environmental management" in collaboration with Technical Committee CEN/SS S26 “Environmental
management” the secretariat of which is held by CCMC.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2021, and conflicting national standards
shall be withdrawn at the latest by September 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 14091:2021 has been approved by CEN as EN ISO 14091:2021 without any modification.

INTERNATIONAL ISO
STANDARD 14091
First edition
2021-02
Adaptation to climate change —
Guidelines on vulnerability, impacts
and risk assessment
Adaptation au changement climatique — Lignes directrices sur la
vulnérabilité, les impacts et l'évaluation des risques
Reference number
ISO 14091:2021(E)
©
ISO 2021
ISO 14091:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 14091:2021(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Introduction to climate change risk assessment . 4
4.1 Concept of climate change risk . 4
4.2 Assessing climate change risk. 5
4.2.1 Objectives . 5
4.2.2 Value-based judgements . 5
5 Preparing a climate change risk assessment . 5
5.1 Establishing the context . 5
5.2 Identifying objectives and expected outcomes . 6
5.3 Establishing a project team . 6
5.4 Determining the scope and methodology. 7
5.5 Setting the time horizon . 7
5.6 Gathering relevant information . 8
5.7 Preparing an implementation plan . 8
5.8 Transparency . 8
5.9 Participatory approach . 9
6 Implementing a climate change risk assessment. 9
6.1 Screening impacts and developing impact chains . 9
6.1.1 General. 9
6.1.2 Screening and identifying impacts . 9
6.1.3 Developing impact chains . 9
6.2 Identifying indicators .10
6.2.1 General.10
6.2.2 Selecting indicators .10
6.2.3 Creating a list of indicators .11
6.3 Acquiring and managing data .11
6.3.1 Gathering data . .11
6.3.2 Evaluating data quality and results .12
6.3.3 Managing data .12
6.4 Aggregating indicators and risk components .13
6.5 Assessing adaptive capacity .13
6.6 Interpreting and evaluating the findings .14
6.7 Analysing cross-sectoral interdependencies.14
6.8 Independent review .14
7 Reporting and communicating climate change risk assessment results .14
7.1 Climate change risk assessment report .14
7.2 Communicating climate change risk assessment results .16
7.3 Reporting findings as a basis for appropriate adaptation planning .16
Annex A (informative) Linking vulnerability and risk management concepts — Change of
the conceptual framework between IPCC AR4 and IPCC AR5 .17
Annex B (informative) Risk assessment and uncertainty — Climate and non-climatic scenarios .20
Annex C (informative) Examples of impact chains and dos and don’ts when developing
impact chains .21
Annex D (informative) Example of a screening matrix .26
Annex E (informative) Examples of indicators for risk and vulnerability assessments .28
ISO 14091:2021(E)
Annex F (informative) Aggregating indicators and risk components .29
Annex G (informative) Components of adaptive capacity.31
Annex H (informative) Assessing adaptive capacity .34
Bibliography .38
iv © ISO 2021 – All rights reserved

ISO 14091:2021(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 207, Environmental management,
Subcommittee SC 7, Greenhouse gas management and related activities, in collaboration with
the European Committee for Standardization (CEN) Technical Committee CEN/SS S26, Environmental
management, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
ISO 14091:2021(E)
Introduction
Climate change is impacting organizations in various ways and it is anticipated that these impacts
will continue well into the future. Organizations have an increasing need to understand, mitigate and
manage climate change risks. Climate change risk assessment is key in this context. For responses
to be delivered at the necessary pace and scale, it is important that risk assessment approaches are
systematic and replicable, permitting learning within and between assessments as new knowledge,
technology and experience arise. This document provides guidelines on approaches to assess climate
change-related risks.
Risk assessments improve planning of adaptation to climate change and inform the implementation and
monitoring of climate change adaptation activities. Adaptation is usually more effective when initiated
at an early stage of project development, and when undertaken as a planned process rather than in
response to experienced impacts. Better knowledge of climate change risks will make it easier and less
costly to respond.
Climate change risks differ from other risks. It is often difficult or even impossible to quantify their
short- or long-term probability so a conventional risk assessment that uses statistical probabilities can
be ineffective. For this reason, various approaches have been developed for assessing climate change
risks. This document provides guidance on the use of screening assessments and impact chains. The
screening approach can serve as a stand-alone, simplified risk assessment for a straight-forward
system at risk or for organizations with a limited budget, or serve as a pre-assessment prior to the use
of impact chains. Based on a participatory and inclusive process, impact chain approaches are more
comprehensive, providing an opportunity to address all relevant factors. Both screening assessments
and impact chain assessments allow for qualitative and quantitative analysis.
This document is relevant to any organization regardless of size, type and nature. For example, it can
help financial institutions with decisions in project financing, companies operating in climate-sensitive
business sectors or local governments developing adaptation strategies.
This document covers risks that result from a changing climate. It does not address risks that result
from the transition to a low carbon economy. This document recognizes that climate risks can be
threats or opportunities.
This document emphasizes comprehensive documentation and communication of climate change risks;
these are essential for all subsequent activities. Risk assessments, among other purposes, provide
information on identifying adaptation actions and prioritizing them. Risk assessments conducted in
accordance with this document also strengthen planning activities on disaster risk reduction (DRR).
This document can be applied by organizations that want to carry out climate change risk assessments
[in the sense of the Fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change
(IPCC)] as well as by organizations that want to carry out vulnerability assessments (in the sense of the
IPCC AR4). However, it uses risk assessment as the central term.
This document belongs to an emerging family of standards on adaptation to climate change under the
umbrella of ISO 14090, which describes the following elements of climate change adaptation:
— pre-planning;
— assessing impacts including opportunities;
— adaptation planning;
— implementation;
— monitoring and evaluation;
— reporting and communication.
This document is part of the second item on the above list: “assessing impacts including opportunities”.
ISO/TS 14092:2020 helps define adaptation planning for local governments and communities. Other
vi © ISO 2021 – All rights reserved

ISO 14091:2021(E)
International Standards also deal with climate change or are in some way linked to this document. For
example, ISO 31000 is an excellent companion because it can help organizations manage the risks that
are identified and assessed in this document, which itself is a specialized expansion of the limited risk
assessment portion of ISO 31000. ISO 14001 allows for the integration of climate change adaptation
into an environmental management system and this document provides additional information to
support this.
This document is a guidance document for people working in the field of climate change.
This document is structured starting with an introduction to the concept of climate change
risk assessment, followed by the preparation, the implementation and the documentation and
communication of the climate change risk assessment.
The guidelines provided in this document are accompanied by supporting examples and information.
In this document, the following verbal forms are used:
— “should” indicates a recommendation;
— “may” indicates a permission;
— “can” indicates a possibility or capability.
INTERNATIONAL STANDARD ISO 14091:2021(E)
Adaptation to climate change — Guidelines on
vulnerability, impacts and risk assessment
1 Scope
This document gives guidelines for assessing the risks related to the potential impacts of climate
change. It describes how to understand vulnerability and how to develop and implement a sound risk
assessment in the context of climate change. It can be used for assessing both present and future climate
change risks.
Risk assessment according to this document provides a basis for climate change adaptation planning,
implementation, and monitoring and evaluation for any organization, regardless of size, type and nature.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
organization
person or group of people that has its own functions with responsibilities, authorities and relationships
to achieve its objectives
Note 1 to entry: The concept of organization includes, but is not limited to, sole-trader, company, corporation, firm,
enterprise, authority, partnership, charity or institution, or part or combination thereof, whether incorporated
or not, public or private.
[SOURCE: ISO 14001:2015, 3.1.4]
3.2
interested party
person or organization (3.1) that can affect, be affected by, or perceive itself to be affected by a decision
or activity
EXAMPLE Customers, communities, suppliers, regulators, non-governmental organizations, investors,
employees and academia.
Note 1 to entry: To “perceive itself to be affected” means the perception has been made known to the organization
applying this document.
[SOURCE: ISO 14001:2015, 3.1.6, modified — “academia” has been added to the example and “applying
this document” has been added to Note 1 to entry.]
ISO 14091:2021(E)
3.3
system
set of interrelated or interacting elements
[SOURCE: ISO 9000:2015, 3.5.1]
3.4
climate
statistical description of weather in terms of the mean and variability of relevant quantities over a
period of time ranging from months to thousands or millions of years
Note 1 to entry: The classical period for averaging these variables is 30 years, as defined by the World
[26]
Meteorological Organization .
Note 2 to entry: The relevant quantities are most often near-surface variables such as temperature, precipitation,
and wind.
[SOURCE: ISO 14090:2019, 3.4]
3.5
climate change
change in climate (3.4) that persists for an extended period, typically decades or longer
Note 1 to entry: Climate change can be identified by such means as statistical tests (e.g. on changes in the mean,
variability).
Note 2 to entry: Climate change might be due to natural processes, internal to the climate system (3.3), or external
forcings such as modulations of the solar cycles, volcanic eruptions, and persistent anthropogenic changes in the
composition of the atmosphere or in land use.
[SOURCE: ISO 14090:2019, 3.5]
3.6
adaptation to climate change
climate change adaptation
process of adjustment to actual or expected climate (3.4) and its effects
Note 1 to entry: In human systems (3.3), adaptation seeks to moderate or avoid harm or exploit beneficial
opportunities.
Note 2 to entry: In some natural systems, human intervention can facilitate adjustment to expected climate and
its effects.
[SOURCE: ISO 14090:2019, 3.1]
3.7
climate projection
simulated response of the climate system (3.3) to a scenario of future emission or concentration of
greenhouse gases and aerosols, generally derived using climate models
Note 1 to entry: Climate projections are distinguished from climate predictions in order to emphasize that
climate projections depend upon the emission/concentration/radiative forcing scenario used, which are based
on assumptions concerning, for example, future socioeconomic and technological developments that may or may
not be realized.
[SOURCE: Adapted from IPCC, 2014]
3.8
hazard
potential source of harm
Note 1 to entry: The potential for harm can be in terms of loss of life, injury or other health impacts (3.14), as well
as damage and loss to property, infrastructure, livelihoods, service provision, ecosystems and environmental
resources.
2 © ISO 2021 – All rights reserved

ISO 14091:2021(E)
Note 2 to entry: In this document, the term usually refers to climate-related physical events or trends or their
physical impacts.
Note 3 to entry: Hazard comprises slow-onset developments (e.g. rising temperatures over the long term) as well
as rapidly developing climatic extremes (e.g. a heatwave) or increased variability.
[SOURCE: ISO/IEC Guide 51:2014, 3.2, modified — Notes 1 and 2 to entry have been added to reflect the
definition of “hazard” in IPCC, 2014: Annex II: Glossary. Note 3 to entry has been added.]
3.9
exposure
presence of people, livelihoods, species or ecosystems, environmental functions, services, resources,
infrastructure, or economic, social or cultural assets in places and settings that could be affected
Note 1 to entry: Exposure can change over time, for example as a result of land use change.
[SOURCE: ISO 14090:2019, 3.6]
3.10
sensitivity
degree to which a system (3.3) or species is affected, either adversely or beneficially, by climate (3.4)
variability or change
Note 1 to entry: The effect may be direct (e.g. a change in crop yield in response to a change in the mean, range or
variability of temperature) or indirect (e.g. damages caused by an increase in the frequency of coastal flooding
due to sea level rise).
[SOURCE: Adapted from IPCC, 2014]
3.11
adaptive capacity
ability of systems (3.3), institutions, humans, and other organisms to adjust to potential damage, to take
advantage of opportunities, or to respond to consequences
[SOURCE: ISO 14090:2019, 3.2]
3.12
vulnerability
propensity or predisposition to be adversely affected
Note 1 to entry: Vulnerability encompasses a variety of concepts and elements including sensitivity (3.10) or
susceptibility to harm and lack of capacity to cope and adapt.
[SOURCE: ISO 14090:2019, 3.15]
3.13
risk
effect of uncertainty
Note 1 to entry: An effect is a deviation from the expected. It can be positive, negative or both. An effect can arise
as a result of a response, or failure to respond, to an opportunity or to a threat related to objectives.
Note 2 to entry: Uncertainty is the state, even partial, of deficiency of information related to, understanding or
knowledge of an event, its consequence, or likelihood.
[SOURCE: ISO 14001:2015, 3.2.10, modified — Note 1 to entry has been modified. Notes 3 and 4 to entry
have been deleted.]
ISO 14091:2021(E)
3.14
impact
effect on natural and human systems (3.3)
Note 1 to entry: In the context of climate change (3.5), the term “impact” is used primarily to refer to the effects on
natural and human systems of extreme weather and climate events and of climate change. Impacts generally refer
to effects on lives, livelihoods, health, ecosystems, economies, societies, cultures, services and infrastructure due
to the interaction of climate change or hazardous climate events occurring within a specific time period and the
vulnerability (3.12) of an exposed society or system. Impacts are also referred to as consequences and outcomes.
The impacts of climate change on geophysical systems, including floods, droughts and sea level rise, are a subset
of impacts called “physical impacts”.
[SOURCE: ISO 14090:2019, 3.8]
3.15
impact chain
analytical approach that enables understanding of how given hazards (3.8) generate direct and indirect
impacts (3.14) which propagate through a system (3.3) at risk (3.13)
3.16
indicator
quantitative, qualitative or binary variable that can be measured or described, in response to a defined
criterion
[SOURCE: ISO 13065:2015, 3.27]
4 Introduction to climate change risk assessment
4.1 Concept of climate change risk
Climate change risk describes the potential impact of climate change on societies, economies and the
environment.
NOTE 1 This document focuses on the risks induced by the impacts of climate change and not risks from
climate change mitigation policies, e.g. transitional risks.
NOTE 2 The impacts of climate change can arise from gradual changes in climate conditions as well as an
increase in extreme weather events.
The main components for a risk assessment are (illustrated in Figure A.1):
a) the hazard;
b) the exposure of a given system to the hazard;
c) the sensitivity of the system to the hazard;
d) the (potential) climate change impact, i.e. risk without adaptation;
e) the risk with adaptation (in the future).
Future potential climate change impacts can be modified by the adaptive capacity of a system.
EXAMPLE A system can be a region, a community, a household, a supply chain, an economic sector, a
business, a population group, an ecosystem, infrastructure and its components.
Climate change impacts occur because a system is exposed to hazards (e.g. drought, flooding,
heat stress). The sensitivity of the system (e.g. types of crops, land-use, age of the population) will
determine the extent to which these hazards affect it. Impact is a function of both the exposure and
the sensitivity of the system to hazards. The system’s adaptive capacity influences the degree to which
the potential impact becomes a tangible risk. The vulnerability of the exposed system can be expressed
4 © ISO 2021 – All rights reserved

ISO 14091:2021(E)
as a combination of an organization’s sensitivity and its lack of adaptive capacity (the concepts of
vulnerability and climate risk are illustrated in Figures A.2 and A.3).
NOTE 3 Though hazards are defined as sources of potential harm (e.g. heatwaves causing agricultural losses),
they can sometimes lead to opportunities (e.g. higher temperatures leading to additional tourism opportunities).
NOTE 4 For further information on the concept of climate change risk, see Annex A. Table A.1 offers a
comparison between concepts of vulnerability and risk.
4.2 Assessing climate change risk
4.2.1 Objectives
Risk assessments fulfil diverse objectives depending on the information needs of an organization, and
on challenges caused by climate change. These can include the following.
— Raising awareness: Risk assessments help increase awareness of the consequences of climate change.
— Identification and prioritization of risks: Many factors contribute to a system’s sensitivity, exposure
and adaptive capacity. Climate change risk assessments provide insight into these factors and this
helps the organization to prioritize the risks to be addressed.
— Identification of entry points for climate change adaptation intervention: The final results and the
process of risk assessment can help identify possible adaptation responses. Risk assessments can
show where early action is required, e.g. to avoid locking-in future impacts and to highlight the need
for development of adaptive capacity.
— Tracking changes in risk, and monitoring and evaluating adaptation: Repeating risk assessments
[12]
can help to track changes over time and generate knowledge on the effectiveness of adaptation .
4.2.2 Value-based judgements
Value-based judgements are necessary in climate change risk assessments. If impacts cannot be
measured in the same units (e.g. monetary losses, reduced life expectancy in years), the selection of the
most relevant climate change impacts involves value-based judgements. Another instance of a value-
based judgement is the establishment of critical thresholds, if these cannot or can only partially be
inferred from empirical evidence. For example, a threshold for critically low precipitation (say 200 mm/
year) for maintaining a certain type of agriculture (e.g. fruit growing) in a given region can be set based
on past experiences and agro-scientific know-how, but it also depends on judgements as to what is
considered “critical”. To facilitate the interpretation and evaluation of the results of the risk assessment,
[10]
it is important to be transparent about where value-based judgements have been applied . While
value-based judgements cannot be avoided, fact-based approaches should be used wherever possible.
5 Preparing a climate change risk assessment
5.1 Establishing the context
Each risk assessment has a unique context that determines its scope, objectives and planned outputs
(such as a report). The organization should define the context of the assessment by considering the
following.
— The system at risk: Providing a broad outline of the system exposed to the impacts of climate change,
including general understanding of its sensitivity, exposure and adaptive capacity.
— Hazards: Identifying which hazards can potentially affect the system at risk, choosing which ones
to include in the risk assessment, and specifying the type of information required.
— Processes: Identifying existing or planned processes and activities related to the risk assessment
such as assessments of supply chains.
ISO 14091:2021(E)
— Knowledge: Identifying the available knowledge of climate change and variability, of impacts and
existing risk, of existing impact assessments (e.g. including research results and local knowledge)
and of the adaptive capacity of the organization, keeping in mind that the spectrum of possible
impacts can be very broad (see ISO 14090).
— Interested parties: Identifying and involving interested parties in the process as far as it is practicable
(e.g. aspects referring to risks raised by interested parties, such as environmental associations, can
provide relevant inputs to facilitate the broader acceptance of the risk assessment).
— Resources for the assessment: Establishing the availability of financial, human and technical
resources and information/data.
— External developments: Identifying external factors that could influence the system at risk (e.g.
demographic changes, land use changes, technological developments, changes in the political and
[12]
institutional context, market changes, global developments) .
— Regulatory obligations, responsibilities to others: Identifying regulatory or other obligations that
can influence the objectives, the process or the outcomes of the risk assessment.
NOTE Additional guidance on preparing and conducting a risk assessment can be found in ISO 31000. It
places this document in the broader context of risk management.
5.2 Identifying objectives and expected outcomes
An organization’s decision to conduct a risk assessment is driven by a need or an information gap.
The organization should:
— determine the objectives and expected outcomes of the risk assessment and the processes that the
risk assessment will support or feed into;
— identify the information gaps that the risk assessment is to address;
— define how the knowledge and results that will be generated are to be used (e.g. input into ongoing
adaptation efforts or planning new adaptation actions);
— clarify how the results of the risk assessment will be depicted (e.g. map with risk hotspots, ranking
of vulnerable sectors, narrative analysis of risk and its relevant factors);
— involve the experts, institutions and interested parties needed to conduct the assessment and
support the implementation of the results in adaptation decisions;
— identify and inform the target audience, at an early stage, about the process and the expected
outcomes and outputs of the risk assessment.
5.3 Establishing a project team
The organization should appoint a project team to carry out the risk assessment. The project team
should have an understanding about the content of this document and the following:
— the organization, the system at risk and the organization’s relation to the system at risk;
— the context of the system at risk (e.g. relationships up and downstream, geographical location(s),
regulatory obligations, responsibilities to others, supply chain);
— climate change and its general impacts.
The project team should have informed leadership with decision-making capacity within the
organization, as well as including specialists to assist in forming action plans and defining objectives.
Organizations can benefit when decision-maker(s) are engaged early in the process. This is because
value judgements are often required and because involvement in the process improves ownership of
the results.
6 © ISO 2021 – All rights reserved

ISO 14091:2021(E)
The organization can involve external experts in its project team or in an advisory role.
Roles and responsibilities of all parties (including internal and external experts as well as decision-
makers) should be defined.
The project team should communicate regularly to coordinate central assessment steps and results and
on the sufficiency of resources and the need for high-level support.
Other interested parties can be involved through a participatory process. Interested parties can
be engaged at the outset of the assessment (to understand context, to gather information) as well as
during and after the assessment (to validate). The organization should sufficiently account for gender
differences and ensure that especially vulnerable groups are represented and measures taken to ensure
that they are able to effectively contribute to the risk assessment.
5.4 Determining the scope and methodology
The project team in coordination with the relevant decision-makers should define the scope of the risk
assessment, considering the following:
— the specific system at risk;
— the level of detail needed for the assessment to be fit-for-purpose;
— population groups involved (e.g. rural communities, elderly people, indigenous people, women/
men, certain parts of the work force);
— the range of hazards to be included (e.g. flooding, rising temperatures, sea level rise, heatwaves)
and their nature (e.g. extremes, changes in the mean and variability);
— the areas under review (e.g. countries, districts, provinces), and whether it is a single spatial unit
(e.g. one district) or a comparison of areas (e.g. two or more districts);
— the spatial resolution of the assessment (a decision on spatial scale can be influenced by the
availability of data relevant to the assessment);
— the temporal resolution of the assessment (see 5.5);
— the methodology to be used in the assessment (e.g. quantitative, qualitative, mixed approaches);
— the resources (e.g. financial, human) available for the risk assessment.
5.5 Setting the time horizon
When setting the time horizon of the assessment, the organization should consider:
— the lifetime of the system at risk;
— the timescales over which the impacts of climate change reach critical thresholds for the system
at risk;
— the lead time for adaptation actions to address impacts. This may be related to the lifetime of
the system.
The choice of time horizon can be influenced by aspects such as:
— the availability of data, including climate projections;
— the longer-term uncertainties in projected impacts of climate change;
— the potential for interactions between impacts to occur over different timescales.
ISO 14091:2021(E)
The organization can benefit from considering more than one time horizon. For example, a reference
period of the recent past (e.g. the last three decades) or the present, one near future (e.g. the next three
decades) and one distant future (e.g. 2070 to 2100).
The near future is often more important for decisions on adaptation to climate change than the distant
future. However, using the distant future is essential for systems that require very long periods of time
to adapt, e.g. forest ecosystems.
Time periods longer than 100 years can be considered as the time horizon of a risk assessment. They
can be relevant, for example, in the case of sea level rise for coastal cities or for long-lasting assets.
The time horizon for assessing the hazard should be at least 30 years, the standard period as defined by
[26]
the World Meteorological Organization .
5.6 Gathering relevant information
Where available, existing knowledge on hazards, sensitivities, exposure, climate change impacts,
vulnerabilities related to the system at risk, adaptive capacity, existing risk assessments and tools used
to manage risks should be collected early on. It can be useful to collect knowledge of other drivers of
change (such as investment cycles) to align the risk assessment with organizational decision processes.
NOTE For further information on methodologies, various national and international guidance documents
and tools can be found online. Be aware that some of them apply different terminology (compare Annex A).
5.7 Preparing an implementation plan
Having completed the steps
...