A market signal, in slow motion

For most of the twentieth century, US homeowners insurance was a stable, lightly regulated, broadly available product. Premiums tracked claims plus underwriting margin; coverage was widely accessible; the industry was profitable.

That stability is breaking down in the most climate-exposed parts of the country, in three distinct ways:

1. Withdrawal. Major insurers (Allstate, State Farm, USAA, Farmers, others) have stopped writing new policies, or have stopped renewing existing policies, in California wildfire zones, Florida hurricane corridors, and Louisiana flood-and-wind zones.

2. Repricing. Where insurance is still available, premiums have risen sharply. Annual premium increases of 30-50% have been common in high-risk zones; some homeowners have seen their premiums double or triple in a few years.

3. Risk transfer. As private insurers pull back, the risk transfers to state-backed insurers of last resort (Florida’s Citizens Property Insurance, California’s FAIR Plan, Louisiana’s Citizens), to the federal flood insurance program (NFIP), and to homeowners themselves through deductibles, exclusions, and coverage gaps.

Each of these patterns is independently visible. Together they mark a structural shift in how the US distributes climate risk.

What insurers see

The withdrawal is not, despite the rhetoric of some industry advocates, primarily a regulatory grievance. Insurers point to several specific drivers:

• Reinsurance costs. The reinsurance market — insurance for insurers — has hardened sharply since 2017. Reinsurers, which absorb tail risk, have repriced US catastrophe coverage based on observed loss development.
• Catastrophe model updates. Catastrophe modeling firms (RMS, Verisk/AIR, KCC) have updated their models to incorporate higher baseline frequency and severity of hurricanes, wildfires, and severe convective storms. The updated models produce higher expected losses across the high-risk zones.
• Construction-cost inflation. Rebuilding costs have outpaced general inflation since 2020, raising loss-given-event substantially.
• Litigation patterns. In Florida specifically, attorneys’ fee statutes and the assignment-of-benefits framework drove litigation costs higher; reforms in 2022-2023 have moderated this but the legacy effect persists.
• Regulatory rate suppression. California’s Proposition 103 (1988) requires regulatory approval for rate increases and has historically held rates below actuarial levels. Insurers argue this made the California market structurally unprofitable; the 2024 reform package permits modeled losses in rate-setting, partly addressing this.

The combined effect is that several large insurers concluded that high-risk-zone underwriting was unprofitable and exited.

What that means for homeowners

For a homeowner in an affected zone, the cascading consequences are substantial:

• Mortgage exposure. Most mortgages require homeowners insurance. A homeowner who cannot find coverage may be force-placed into a much more expensive lender-placed policy, or be in technical default.
• Refinancing constraints. A home that cannot be insured may not be financeable at all. This affects not just the current owner but anyone they might sell to.
• Property values. In severely affected sub-markets, property values have begun to reflect the insurance situation. The effect is large in some submarkets, modest in others.
• State-backed insurer concentration. State insurers of last resort were designed to be small and temporary. They are now, in some states, the largest single insurer. Their solvency depends on state assessments and, ultimately, taxpayer backstops.

The federal angle

The federal lever in this situation is more limited than it looks. Insurance is regulated state-by-state under the McCarran-Ferguson Act of 1945. Federal flood insurance (NFIP) is the major exception, but NFIP has its own structural problems: chronically underfunded, with premiums historically below actuarial levels and reauthorization fights every few years.

Federal options on the table:

• NFIP reform. Risk-based pricing (Risk Rating 2.0 began phasing in starting 2021), reauthorization with substantive reform, means-tested subsidies for low-income policyholders, and structural changes to the program’s funding.
• Federal disaster assistance. Pre-disaster mitigation funding (the BRIC program, building-code grants) has higher ROI per dollar than post-disaster spending. Expansions are persistently underfunded.
• Federal climate-resilient infrastructure standards. The 2021 Bipartisan Infrastructure Law included substantial resilience funding; implementation is ongoing.
• Federal backstop for state catastrophe pools. Various proposals have been floated for a federal reinsurance backstop for state insurers of last resort, similar to TRIA (the federal terrorism reinsurance backstop). None have advanced.
• Federal disclosure rules. Some securities-disclosure rules (like the SEC’s climate disclosure rule, in litigation) would force public real-estate-related issuers to disclose climate risk explicitly.

What states are doing

State-level responses vary widely:

• California (2024 reform package): allows insurers to use forward-looking catastrophe models in rate-setting (previously prohibited under Prop 103); requires insurers writing in lower-risk zones to also write in higher-risk zones, in proportion to their statewide market share.
• Florida: 2022-2023 tort reforms reduced litigation costs; the state Citizens program has been working to depopulate to private insurers; reforms to building codes for new construction.
• Louisiana: insurer incentives to enter or stay in the market; building-code updates; state pool reform.

The early evidence on these reforms is mixed. California’s reform brought some insurers back, but volumes are still well below pre-2020 levels. Florida’s reforms reduced litigation costs but premiums remain high. Louisiana’s situation remains the most fragile.

What’s not being done at scale

Several promising approaches remain under-deployed:

• Managed retreat: structured federal or state buyouts of repeatedly damaged properties, particularly in flood-exposed coastal zones. NFIP has small buyout programs; scale is well below need.
• Land-use reform: stopping new development in known disaster zones is the most cost-effective long-term lever. Most state and local zoning continues to permit new construction in zones the federal government will not, ultimately, be willing to bail out.
• Federal climate-risk disclosure: comprehensive, granular climate-risk data for residential properties remains scattered across private vendors. A public, standardized risk score (like flood-zone designations, but updated continuously and covering all major perils) would shift purchaser decisions and lender practices.

What to watch

• California reform implementation: whether large insurers re-enter the market at meaningful scale.
• Florida Citizens depopulation: whether the state-backed insurer can be reduced toward residual-only volume.
• NFIP reauthorization: the next reauthorization is the key federal-flood-insurance vehicle.
• Federal climate-risk disclosure rules: SEC, banking regulators, and insurance regulators each have rulemakings in progress.
• 2026 and 2027 hurricane and wildfire seasons: any major event will produce additional claims pressure and accelerate the patterns above.

Bottom line

Insurance retreat from climate-exposed zones is the most concrete way most Americans will encounter the financial cost of climate change in the next decade. The risk is being transferred — from private insurers to state insurers of last resort to homeowners to taxpayers — through a slow-motion process that does not produce a single politically actionable moment but does produce continuous pressure. The policy responses available are real but underutilized. Adaptation is happening regardless. The choice is whether it is planned and equitable, or chaotic and regressive.