Climate change is quietly transferring one of the world's largest financial risks onto taxpayers, and almost nobody is talking about it. We continue to assume that insurance absorbs the economic shock of disasters, protecting households, businesses, and governments from escalating losses. That assumption no longer reflects how climate risk is moving through today's financial system. As insurers confront risks that are becoming more difficult to price, governments are absorbing a growing share of the exposure, placing public finances under increasing strain. This shift carries consequences that reach far beyond insurance markets because every taxpayer ultimately becomes part of the financial backstop.
Insurance functions because uncertainty can be priced with reasonable confidence. Historical data, diversified pools of policyholders, and statistical probability have allowed insurers to estimate future losses and allocate capital accordingly. That framework has supported modern economies for generations because lenders, homeowners, businesses, and governments all rely on insurance to convert uncertainty into manageable financial risk. The system has remained remarkably resilient for decades because its underlying assumptions have held true across a wide range of economic conditions.
Those assumptions are becoming more difficult to sustain. Climate-related disasters are challenging the statistical foundations on which insurance was built. Wildfires, floods, prolonged heat, drought, and severe storms increasingly interact across regions instead of remaining isolated events. Losses continue to expand in scale, while historical records provide diminishing certainty about future conditions as climate patterns evolve. Pricing risk becomes substantially more difficult when the past no longer offers a dependable guide to the future.
Climate risk does not disappear because private insurers become more selective. Financial responsibility simply moves elsewhere. Increasingly, that destination is the public balance sheet. Governments are expanding programs that absorb risks private markets cannot fully accommodate, leaving taxpayers responsible for liabilities that continue growing with every major disaster. We never collectively decided to make taxpayers the insurer of last resort, yet financial markets are steadily moving in that direction.
Evidence of this migration is growing in the United States. State FAIR Plans, federal flood insurance, crop insurance programs, and other public mechanisms have expanded as private insurers reassess participation in higher-risk markets. Thirty-five states now operate programs that provide coverage where private insurance is unavailable. These programs concentrate risk and provide limited incentives for reducing underlying exposure, raising important questions about their long-term sustainability.
California illustrates how quickly this migration can occur. As private insurers reduced new business in parts of the state, the FAIR Plan expanded dramatically to absorb policyholders who still needed coverage. Insurance premiums also tend to increase when this migration occurs. The pattern reveals how climate risk moves through financial systems. Exposure leaves one balance sheet only to reappear on another, with public institutions carrying an increasing share of the burden.
The consequences extend well beyond insurance availability. When a major disaster damages homes, businesses, utilities, and public infrastructure, the financial effects spread throughout the economy. Local governments often experience declining tax revenues while facing sharply higher recovery costs. Property values weaken where insurance becomes scarce or prohibitively expensive. Banks respond to changing collateral values by tightening lending conditions. Municipalities then face higher borrowing costs precisely when they need capital most. One dollar of physical damage can therefore generate several dollars of financial consequences that ripple through communities long after the immediate recovery effort has ended.
The insurance industry recognizes these challenges. More than 83% of U.S. insurers now disclose climate risk across all four pillars of the Task Force on Climate-related Financial Disclosures framework. Yet only 10.5% of assessed disclosures met the standard for substantive reporting. Many insurers acknowledge climate risk while still struggling to quantify it in ways that meaningfully inform long-term underwriting and capital allocation. That gap matters because financial systems cannot allocate capital efficiently when uncertainty remains difficult to measure.
Markets already understand how to finance recovery after disasters. Prevention remains significantly underfunded because its economic value is dispersed across governments, insurers, utilities, lenders, businesses, and communities over long periods of time. Traditional investment structures favor returns that are immediate and easily measured, while the financial benefits of avoided losses accumulate gradually across multiple balance sheets. As a result, projects capable of reducing future liabilities often struggle to compete for capital despite generating substantial long-term economic value.
Prevention deserves recognition as one of the world's most valuable investments. Financial markets already know how to finance recovery. They have yet to consistently recognize the economic value created when disasters become less destructive in the first place. Investments that strengthen infrastructure, reduce wildfire severity, improve flood resilience, or lower future losses generate measurable value across governments, insurers, lenders, utilities, businesses, and communities. Financial architecture now needs to recognize those shared gains with the same sophistication it applies to pricing catastrophe.
Governments will continue carrying climate-related liabilities for the foreseeable future. The defining policy question concerns when those resources are deployed. Every dollar committed before disasters occur has the potential to reduce many more dollars spent after communities begin rebuilding. A financial system that values prevention alongside recovery would strengthen public finances, attract greater private capital into resilience, and reduce the burden that increasingly falls on taxpayers. Climate risk will continue moving through the global economy. The choice before us is whether we continue financing its consequences or begin investing with equal determination in preventing them.
About the Author
Sienna Shankel is the founder and Principal Analyst at Arctica Risk, an independent research platform examining how climate-driven risk propagates through insurance markets, capital markets, and public balance sheets. Her work focuses on catastrophe risk, financial stability, and the institutional structures that influence how risk is priced, transferred, and absorbed. She explores the long-term financial architecture of climate risk, with particular interest in prevention finance, resilience investment, and evolving risk-transfer systems. Consultancy services are offered through Arctica Risk's sister company Arctica Advisory.
