When climate risk makes insurance unaffordable
- Editorial Team SDG13
- 1 day ago
- 6 min read
Published on 29 July 2026 at 03:09 GMT
By Editorial Team SDG13
Climate change is destabilising insurance systems not because every disaster can be attributed to warming, but because the underlying probability and severity of several damaging hazards are shifting while exposure continues to grow. Repeated floods, wildfires, storms and coastal losses are turning what was once treated as an occasional shock into a recurring financial burden. In high-risk areas, climate insurance affordability is becoming a central question for households, farms, businesses, lenders and governments.
Insurance works by pooling losses that are uncertain for any one policyholder but sufficiently predictable across a large group. That model comes under pressure when claims rise faster than premiums, when rebuilding costs increase, or when hazards become more concentrated and correlated. Insurers can respond by raising prices, increasing deductibles, reducing coverage, imposing exclusions or withdrawing from particular locations. Reinsurers, which absorb part of insurers’ largest losses, may also charge more or restrict capacity after severe events.
The result is a widening insurance protection gap, the difference between economic losses and the portion covered by insurance. The gap already exists for many reasons, including low incomes, limited insurance markets, poor risk awareness and incomplete policy coverage. Climate change can deepen it by making existing risks more expensive and by exposing weaknesses in land-use planning, building standards and public infrastructure.
A property can remain standing while becoming financially fragile
For homeowners, the first visible signal is often the annual premium. Yet the wider consequences extend beyond the cost of a policy. A home that cannot obtain adequate insurance may be difficult to mortgage, sell or rebuild after damage. Where lenders require insurance as a condition of a loan, reduced availability can affect access to credit and weaken the value of property used as collateral.
The Bank for International Settlements has identified insurance availability and pricing as an important channel through which climate-related physical risk can reach banks. When residential or commercial property becomes less insurable, lenders may face greater losses if borrowers default after a disaster or if damaged collateral falls in value. This creates a connection between local hazards and broader financial stability.
Europe illustrates the scale of the problem. The European Central Bank and the European Insurance and Occupational Pensions Authority have reported that historically only about one quarter of losses from climate-related catastrophes in the European Union were insured. EIOPA’s 2025 Eurobarometer found that 17 per cent of respondents held property cover for damage caused by natural catastrophes. These figures reflect both supply and demand problems, including affordability, limited awareness and differences between national insurance systems.
Farms and small businesses face compound losses
Farmers are exposed through crops, livestock, buildings, machinery and interruptions to production. A drought may reduce yields without physically damaging a farmhouse, while flood or wildfire can affect land, storage and transport at the same time. Agricultural insurance can provide an important buffer, but coverage may be expensive, heavily subsidised or unavailable for some perils and producers. When repeated losses weaken farm income, the ability to pay future premiums also declines.
Small businesses face a similar combination of property damage and lost revenue. Insurance may cover physical repairs but not every interruption, supply-chain delay or reduction in customer demand. Businesses with limited cash reserves can fail before claims are settled or before local infrastructure is restored. When many firms in the same area are affected, the loss becomes a community and employment issue rather than an isolated insurance event.
The Organisation for Economic Co-operation and Development notes that natural-hazard insurance is generally available in many markets, but households and businesses in high-risk regions may face limitations in availability, affordability and take-up. Its 2026 review of catastrophic-risk protection also shows why governments increasingly use public-private arrangements to support flood and other natural-hazard coverage.
Public budgets become the insurer of last resort
When private coverage is absent or inadequate, pressure shifts to the state. Governments fund emergency response, temporary housing, infrastructure repair, grants, subsidised loans and reconstruction. They may also support public insurance schemes or guarantee extreme layers of loss. These interventions can protect citizens and accelerate recovery, but they create contingent liabilities that are difficult to budget when disasters are frequent or simultaneous.
The World Bank’s Disaster Risk Financing and Insurance Program supports governments in combining instruments such as reserve funds, contingent credit, insurance and catastrophe-risk transfer. The principle is that different layers of risk require different financing. Frequent, lower-cost events may be managed through budgets and reserves, while rarer, severe losses may require insurance, reinsurance or other risk-transfer mechanisms.
Public support can create difficult incentives. If premiums are held artificially low without prevention, development may continue in exposed locations and taxpayers may repeatedly absorb losses. Yet unaided price increases can leave lower-income residents uninsured and trapped in homes that have lost value. Sustainable policy must link support to risk reduction and fair transition measures.
Prevention can preserve insurability
The most durable way to reduce insurance pressure is to lower expected losses. This includes flood defences, drainage, wildfire fuel management, resilient electricity and transport networks, stronger building codes, property-level protection and nature-based measures such as wetland or coastal restoration. Better hazard maps and disclosure can help buyers, owners and lenders understand risk before financial commitments are made.
The OECD has argued that adaptation is the only sustainable means of limiting the long-term increase in climate damages and potential disruption to insurance markets. Insurers can support prevention through premium discounts, conditions for coverage, risk advice and resilient rebuilding after a claim. However, individual incentives have limits when the decisive measures depend on municipal infrastructure, land-use regulation or national investment.
Risk-based pricing can encourage protection, but only when policyholders can act on the information. A household cannot independently relocate a road, reinforce a river system or change regional fire management. Public authorities therefore shape whether private insurance remains viable. Permitting new construction in areas where losses are foreseeable can transfer future costs to residents, insurers, lenders and taxpayers.
Public insurance is a tool, not a substitute for adaptation
Public or public-private insurance can broaden coverage and spread extreme losses across a larger population. The OECD reports that flood-risk programmes of this kind have been established, are being established or are under consideration in at least 14 of its 38 member countries. Their designs vary, including mandatory coverage, state reinsurance, catastrophe pools and targeted subsidies.
Such systems can protect access to insurance where private markets alone struggle, but design matters. Premium assistance can be targeted towards vulnerable households rather than applied uniformly. Coverage can be paired with property-level adaptation, updated building rules and clear limits on repeated reconstruction. Governments also need transparent accounting for the liabilities they assume, particularly where climate risk is rising.
At international level, the challenge is greater in lower-income countries with narrow insurance markets and limited fiscal space. The Intergovernmental Panel on Climate Change has concluded that climate losses can constrain economic growth and reduce the financial resources available for adaptation, especially in developing countries. Insurance can provide liquidity after disasters, but it cannot replace emissions reduction, resilient development or predictable international finance.
Relocation enters the debate when protection reaches its limits
Some places can be defended or adapted for decades. Others may face repeated flooding, erosion, wildfire or water scarcity that makes continued occupation increasingly costly. In such cases, planned relocation or managed retreat may become part of climate policy. This is not simply a technical decision about expected losses. It affects property rights, community identity, employment, public services and the distribution of compensation.
Relocation is most credible when planned before repeated disaster, when residents participate in decisions and when compensation supports suitable alternatives. Poorly designed schemes can divide communities or leave those with the least resources behind. Rebuilding indefinitely can also be inequitable when public money repeatedly supports highly exposed properties.
The emerging policy question is therefore not whether insurance should continue everywhere at any price. It is how societies divide responsibility among property owners, insurers, lenders and governments as risks change. Insurance can finance recovery, but it cannot make unsafe development sustainable. Maintaining workable insurance systems will require a combination of emissions reduction, prevention, transparent risk pricing, targeted public protection and, where necessary, carefully governed relocation.
This issue is directly connected to SDG 13 (climate action) because adaptation and financial resilience determine whether communities can withstand climate-related hazards without repeated loss of homes, livelihoods and public resources. Insurance is becoming a clear channel through which physical climate risk reaches everyday economic decisions.
Further information:
• Intergovernmental Panel on Climate Change, The IPCC assesses climate impacts, adaptation limits and climate-resilient development.
• Organisation for Economic Co-operation and Development, The OECD examines natural-hazard insurance, public-private risk-sharing and affordability.
• European Insurance and Occupational Pensions Authority, EIOPA monitors Europe’s catastrophe protection gap and develops risk-awareness tools.
• European Central Bank, The ECB analyses how protection gaps transmit physical risk through the economy.
• World Bank Disaster Risk Financing and Insurance Program, The programme helps governments protect people and budgets against disaster shocks.
