Extreme weather raises home insurance premiums through five distinct channels, and each one ties a household's bill to losses that may have occurred hundreds or thousands of miles away. The mechanism runs from global reinsurance pricing to flood coverage gaps, and in the hardest-hit markets it has already produced insurer failures and coverage withdrawals.

How does reinsurance pricing reach homeowners?

Home insurers buy their own insurance, called reinsurance, to protect against very large catastrophe losses. When storms and wildfires produce heavy payouts, reinsurers raise their prices, and primary insurers pass much of that added cost to homeowners through rate filings.

Reinsurance exists because a single disaster can generate more claims than one company can pay from its own reserves. A hurricane or wildfire damages thousands of homes in the same area at the same time, a concentration of risk a home insurer cannot spread on its own.

A common arrangement is a catastrophe excess-of-loss treaty. The home insurer keeps losses up to a set level, known as the retention. The reinsurer pays losses above that level, up to an agreed limit, and the insurer pays a premium for this protection.

Reinsurers operate globally. Munich Re, Swiss Re and Hannover Re, along with syndicates in the Lloyd's of London market, take on catastrophe risk from insurers in many countries. A costly U.S. hurricane season and a major earthquake elsewhere draw on the same pool of capital. When heavy losses shrink that capital, the price of protection rises for the insurers that buy it.

The calendar matters. Many property catastrophe treaties renew on Jan. 1. Florida insurers typically renew on June 1, just as the Atlantic hurricane season begins. An insurer facing a higher price at renewal has two choices: pay more for the same protection, or keep a larger share of each loss itself. Either choice adds to the insurer's costs or its exposure.

In the U.S., home insurance is regulated by the states. Insurers file their rates with each state's insurance department, and reinsurance spending is one of the expenses those filings account for. Depending on the state, regulators may review or approve a filing before it takes effect. Once new rates apply, the higher cost shows up on policyholders' renewal bills.

The result: a policy's price reflects catastrophe losses absorbed across the reinsurance market, not only claims filed in its own neighborhood.

What happened to Florida after Hurricane Ian?

Florida shows how hurricane losses can push a home insurance market toward failure. Several Florida insurers became insolvent in 2022, and Hurricane Ian made landfall in southwest Florida that September as a Category 4 storm.

The state entered that year with some of the highest home insurance costs in the U.S. Ian then struck a market already under strain. An insolvent insurer can no longer operate as a normal carrier, and its policyholders must find coverage elsewhere. When several companies fail within a single year, their customers all look for replacement policies during the same stretch.

Citizens Property Insurance Corporation, Florida's insurer of last resort, took on policyholders as those companies failed. The state created Citizens to offer coverage to homeowners who cannot get a policy from a private company. It works as a backstop rather than a competitor, and its book of business grows when private insurers fail or retreat.

That growth carries consequences. A household that moves onto Citizens still has a policy, but it has left a market of competing private companies for a state-created safety net. Its future options depend on whether private insurers return to write new business.

Ian intensified the pressure. A Category 4 hurricane spreads wind damage across a wide area, producing claims from policies throughout its path at the same time. Those claims arrived in the same year several Florida insurers failed, cutting the number of companies competing for customers. Homeowners who stay in the private market buy from carriers that must price in the risk of the next major storm.

Why did State Farm stop writing California policies?

Wildfire risk has narrowed the choice of home insurance in California. State Farm announced in May 2023 that it would stop accepting new homeowners applications in the state.

A pause on new applications works differently from a rate increase. It does not raise the price of a policy. It removes a seller from the market for anyone who is not already a customer, leaving a household shopping for coverage with one fewer large company to ask for a quote.

The effect shows up when a homeowner needs a new policy. Buying a house is one such moment: mortgage lenders generally require borrowers to carry homeowners insurance before a loan closes, so a buyer who cannot get coverage from a major carrier must find it somewhere else before the sale can go through. Fewer insurers writing new business also means fewer quotes to compare, and the terms on offer come from whichever companies are still accepting applications.

When private options run out, California homeowners can turn to the California FAIR Plan, the state's insurer of last resort, whose purpose is access rather than competition.

Wildfire reached Southern California's largest metropolitan area in January 2025, when the Palisades and Eaton fires both began in the Los Angeles area. Large fires in built-up areas produce claims across many homes at once, and that concentration is what makes wildfire a catastrophe risk for insurers rather than a scattered series of single-house losses. For California homeowners, wildfire risk shows up in availability as well as price. At a purchase or a switch between carriers, the first question can be whether a company will accept the application at all.

How do wind and hail deductibles shift costs to owners?

Hail and thunderstorm winds do most of their damage to roofs, and roofs are expensive to replace. Many insurers use separate wind and hail deductibles set as a percentage of a home's insured value.

Insurers group hail, damaging straight-line winds and tornadoes under the label severe convective storms. Hailstones form inside towering thunderclouds as strong updrafts carry ice upward through layers of supercooled water. Large stones can crack asphalt shingles, strip away their protective granules, dent metal roofing and break skylights. One storm can damage roofs across an entire metro area in a single afternoon. Texas and Colorado are two of the states where hail is a recurring hazard.

A roof claim often means a full replacement rather than a patch, because new shingles cannot always be matched to an older, weathered roof. The percentage deductible changes the math for owners:

• A standard deductible is a flat dollar amount.
• A wind and hail deductible is a share of the dwelling coverage limit, so it grows as the insured value grows.
• Owners of more expensive homes pay a larger dollar amount before coverage begins.
• The separate deductible applies only to wind and hail losses; a kitchen fire or burst pipe still falls under the regular deductible.

Claim settlement terms matter too. Some insurers pay roof claims at actual cash value instead of replacement cost. Replacement cost covers the price of a new roof of similar kind and quality. Actual cash value subtracts depreciation for age and wear, and on an older roof that deduction can leave the owner paying a large part of the replacement.

Some insurers in hail-prone states offer premium discounts for impact-resistant roofing. The highest rating under the UL 2218 standard is Class 4, which requires roofing samples to survive repeated steel-ball impacts in laboratory testing without cracking. Discount availability varies by insurer and by state.

What does FEMA's Risk Rating 2.0 change for flood coverage?

Standard homeowners policies exclude flood damage, so protection against rising water must be bought separately. Most U.S. households that carry flood cover get it through the National Flood Insurance Program, and private insurers also sell flood policies.

Flooding is a common result of extreme weather. Hurricane storm surge, overflowing rivers and intense rainfall can all push water into a house. A homeowners policy may pay when wind tears off a roof during a storm, but it will not pay when water rises through the floor. Owners without separate flood cover pay for that damage themselves or turn to federal disaster assistance, which is not designed to fully restore a home. Much of that aid comes as low-interest loans that must be repaid.

Congress created the NFIP, run by FEMA, partly because private insurers had largely stopped offering flood coverage. Federal law requires flood insurance for homes in high-risk flood zones with mortgages from federally regulated or insured lenders. Outside those zones, buying a policy is optional, and many owners skip it. Flooding still reaches homes beyond mapped high-risk areas, especially when heavy rain overwhelms local drainage.

FEMA overhauled how the program sets prices with Risk Rating 2.0, which took effect on Oct. 1, 2021. The system prices each property by its individual flood risk rather than by flood-zone maps alone. Under the older approach, a home's zone and elevation drove much of the premium.

Risk Rating 2.0 weighs a wider set of property-specific factors. FEMA lists distance to a water source, the types and frequency of flooding a location faces, and the cost to rebuild the home among them. Two neighboring houses in the same zone can now receive different prices.

The change cut in both directions. Some policyholders whose risk had been overpriced saw premiums fall; those whose risk had been underpriced faced increases. The program phases those increases in over time through annual limits set by law, rather than applying them all at once.

Flood pricing now tracks a home's own exposure more closely. When a location's flood risk rises, that risk is more likely to appear in the owner's bill.