There exists a range of approaches and instruments to manage the loss and damage associated with the impacts of climate change. The challenge for decision makers is to identify which ones are more appropriate not only to the type of risk but al so to the socioeconomic circumstances of the people and communities that are at risk.
Three risk management approaches can be identified for climate change risks. These are risk reduction, risk retention, and risk transfer.
In this explainer, we define each approach, give examples of related instruments or measures, and discuss the pros and cons. Lastly, we present the implementation requirements of each approach.
The risk reduction approach entails putting in place measures (either structural or non-structural) before an event occurs with the goal of reducing loss and damage, which could be caused by slow onset events, such as desertification, sea level rise, and ocean acidification, or by extreme weather events, such as storms and flash floods
Table 1: Examples of Structural and Non-Structural Risk Reduction Measures
| Structural Risk Reduction Measures | Non-Structural Risk Reduction Measures |
|---|---|
|
|
While the implementation of risk reduction measures may be costly, the benefit of such measures (where the benefit is the estimated reduction in expected loss and damage) should justify implementation costs.
Risk retention is defined as an approach by which a society or community (at national or local level) would accept a degree of risk of loss and damage associated with impacts from slow onset and/or extreme weather events.
Table 2: Examples of Planned and Unplanned Risk Retention Measures
| Planned Risk Retention Measures | Unplanned Risk Retention Measures |
|---|---|
|
|
A distinction is made between planned and unplanned risk retention measures. Planned risk retention measures involve setting aside public funds explicitly to respond to emergency needs. Unplanned risk retention measures involve drawing from the general budget for an unforeseen emergency, making it an unexpected burden to fiscal resources.
This approach involves shifting the risk of loss and damage from one entity to another. It is typically undertaken when the potential loss and damage is greater than the ability to manage it. Insurance (including microinsurance) is a risk transfer measure and so are catastrophe bonds, risk pooling, conditional risk transfer, and combined insurance-credit programs.
Risk transfer measures can be invaluable to governments, or even households, as they help limit the financial burden of rebuilding or recovering from loss and damage.
Loss and damage can be triggered by extreme weather or by slow-onset hazard. In general, risk reduction should be undertaken in either case wherever cost-effective risk mitigation can take place.
Similarly, risk retention is likely to be effective in both types of situations. However, this risk management approach is likely to be of greater importance to mitigate the impact of slow-onset hazards, which are projected to happen with a great degree of certainty (such as sea-level rise).
The use of risk transfer instruments is focused mostly on addressing the impacts of extreme weather events. However, these instruments may also be useful for addressing the impacts of slow-onset events. For example, there are well-developed insurance schemes designed to protect against loss and damage from drought.
The selection of an approach or combination of approaches also depends on the frequency and level of impact of the event.
In the case of extreme weather events that occur with a high degree of frequency but with low impact (or low severity)—such as recurring localized annual floods, risk retention (accompanied by risk prevention and reduction) may be a better suited approach.
In the case of extreme weather events with a low degree of frequency but high impact (such as a 1-in-100 year typhoon affecting a large territory), risk transfer (accompanied by risk prevention and reduction) may be a more suited and economically effective approach.
The gradation from risk retention to risk transfer is referred to as risk layering.
The relative advantages of each risk management approach is presented in Table 3 while limitations are presented in Table 4.
Table 3: Advantages of Different Risk Management Approaches
| Approaches | Advantages |
|---|---|
| Risk reduction |
|
| Risk retention |
|
| Risk transfer |
|
Table 4: Limitations of Different Risk Management Approaches
| Approaches | Limitations |
|---|---|
| Risk reduction |
|
| Risk retention |
|
| Risk transfer |
|
Different risk management approaches require different elements to be in place for the approach to be effective.
Table 5: Implementation Requirements of Different Risk Management Approaches
| Approaches | Implementation Requirements |
|---|---|
| Risk reduction |
|
| Risk retention |
|
| Risk transfer |
|
Risk reduction, risk retention, and risk transfer are the three broad risk management approaches to address the loss and damage associated with climate change impacts. Each approach has its own strengths and weaknesses.
Risk reduction will reduce damages. However, it is often costly and its benefits remain only “expected benefits” at the time that risk reduction measures are implemented.
When applied to extreme weather events, risk retention is more likely to be a preferred approach to mitigate the loss and damage resulting from events with smaller impacts and occurring relatively often.
Risk transfer is more likely to be a more effective approach to mitigate the loss and damage resulting from events occurring infrequently, but with larger impacts.
Poundrik, S. 2011. Disaster Risk Financing: Case Studies. Working Paper No. 23. EAP DRM Knowledge Notes: Disaster Risk Management in East Asia and the Pacific. Washington, D.C.: The World Bank.
Explainer: Understanding the Risks of Loss and Damage from Climate Change
Explainer: Ways to Pay for Climate-Related Loss and Damage
Explainer: Developing New Financing Tools for the Climate Vulnerable
Explainer: Catastrophe Bonds Explained
Explainer: What Countries Are Doing to Protect against Climate-Related Loss and Damage
Explainer: Mobilizing Contingency Funds for Climate-Related Disasters
Explainer: Key Lessons for Addressing Unavoidable Impacts of Climate Change
Xianfu Lu was ADB’s focal point for climate change adaptation until April 2019. Prior to joining ADB, she worked at UNDP’s Global Environmental Facility Unit and at the Secretariat of the UN Framework Convention on Climate Change. Trained as an applied meteorologist, she spent the first 10 years of her career researching climate scenarios and their use in climate change impacts and vulnerability assessments in different parts of the world.
Rexel Abrigo supported key adaptation-related activities, including the implementation of ADB’s climate risk management framework. He was also part of the team that mainstreamed climate change adaptation in the project development process for South Asia, and implemented several capacity building activities there. He has a Master of Science degree on Environmental Science and Management.
