Climate Change Impact on the Insurance Industry in 2026

In the last week of June, Europe went through what World Weather Attribution called its most severe heatwave on record. Of the nearly 850 cities whose heat stress the group tracks, around 45% broke their all-time records or came within touching distance. The attribution verdict, published while the event was still running, was blunt: heat like this was virtually impossible fifty years ago.

That same week, reinsurance brokers were finalising July renewal quotes roughly 16% cheaper than a year earlier.

Those two facts describe the same industry in the same month, and they point in opposite directions. The newest climate change reports say the physical risk is compounding. The insurance industry has spent 2026 pricing property catastrophe as if it were receding. What follows is a close reading of the 2026 reports, the impact already visible on insurers’ books, and the products being built inside the gap between the two.

The Newest Climate Change Reports and Predictions

The World Meteorological Organization’s State of the Global Climate 2025, published in March 2026, ranked 2025 as the second or third warmest year in the 176-year observational record, at about 1.43°C above the 1850-1900 average. The eleven warmest years ever measured are now the last eleven.

The ranking is not the report’s most important number.

For the first time, the WMO elevated Earth’s energy imbalance - the gap between the heat arriving from the sun and the heat leaving - to a headline indicator, and it set a record in 2025. More than 90% of that surplus goes into the ocean. For an underwriter, this is the line that separates weather from trend: annual rankings wobble with El Niño, but a rising energy imbalance means the system that generates hurricanes, convective storms and marine heatwaves is being loaded with more fuel every year, whatever any single season delivers. The three main greenhouse gases all set concentration records in 2024, the last year with consolidated figures, so the loading is still accelerating.

The WMO’s Global Annual to Decadal Climate Update, published 28 May 2026, turned that loading into odds.

“There is an El Niño predicted for the end of 2026, which increases the chances of the following year, 2027, being the next record-breaking year,” said Dr Leon Hermanson, the report’s lead author. The same update predicts Arctic winters running 2.8°C above their recent average, three and a half times the global anomaly.

Attribution science closed the loop in June. World Weather Attribution found the heatwave’s daytime temperatures ran about 3.5°C hotter than the same weather pattern would have produced fifty years earlier. A month later, Munich Re quoted that finding in its own half-year catastrophe review. The reinsurer’s loss ledger and the climate literature now cite each other.

None of this is a 2100 scenario. The horizon on every number above is 2030.

Natural Catastrophe Losses in 2025 and 2026

The loss data for 2025 is unusually undisputed. Swiss Re Institute’s sigma, published in March 2026, counted US$107 billion of insured natural catastrophe losses against US$220 billion of economic losses; Munich Re’s January tally reached US$108 billion and US$224 billion. It was the sixth consecutive year insured losses cleared US$100 billion.

Where the losses came from matters more than their size. A record 92% of insured losses were driven by so-called secondary perils: wildfire, severe convective storm and flood. The Palisades and Eaton fires cost insurers about US$40 billion in a single January week, the costliest wildfire event ever recorded, and severe convective storms added US$51 billion across the year. Swiss Re puts wildfire’s insured losses on a growth path of roughly 12% a year.

Even this ledger is argued over inside the industry. Steve Bowen, Gallagher Re’s chief science officer, has made the case that much of the US severe convective storm surge reflects exposure growth and cost inflation rather than a change in the hazard itself.

More roofs, worth more, in the path of the same hail.

The industry’s reinsurance architecture was built around the other kind of peril. A hurricane produces one enormous, well-modelled loss that punches high into reinsurance layers. A wildfire season or a hail year produces dozens of mid-sized events that land below the attachment points and stay on primary carriers’ books. As the loss mix shifts toward secondary perils, more of the climate bill is retained by insurers and less is passed up the tower, which is one reason homeowners markets are straining even in years reinsurers describe as manageable. And 2025 carried a large asterisk: not a single hurricane made landfall in the United States. Munich Re called that good fortune, not a trend.

The quietest half-year in eight years

Then 2026 opened with silence. Gallagher Re’s half-year report put H1 insured losses at US$46 billion, the lowest first half in eight years and 28% below the ten-year average. The market has now gone five consecutive quarters without a single US$10 billion insured event. Munich Re’s own half-year count landed at US$44 billion insured. The two firms’ economic tallies disagree, US$142 billion against US$112 billion, a reminder that even loss accounting has error bars.

The costliest event of the half had nothing to do with climate: a double earthquake in Venezuela, US$30 billion of damage, less than US$1 billion of it insured.

Quiet is not the baseline. Balz Grollimund, Swiss Re’s Head of Catastrophe Perils, stated the baseline in March: “If losses return to normal long-term levels, they would total US$148 billion in 2026.” The same sigma puts the underlying trend at 5-7% real growth in insured losses per year.

Gallagher Re’s own report carries the countercurrent to its own good news: forecasters give 2026 a 97.4% probability of ranking among the five warmest years ever recorded, and an El Niño is forming. “[The emergence of El Niño] may not bring record-breaking losses, but the societal implications are considerable,” Bowen wrote.

A calm half-year is weather. The trend is climate.

Reinsurance Rates Are Falling in a Warming Climate

Against that backdrop, the 2026 renewal season produced the sharpest repricing in a generation - downward. Guy Carpenter’s global property catastrophe rate-on-line index fell about 16% across the year’s renewals through July, the steepest annual decline since the late 1990s. Howden had already measured the January round at minus 14.7%, the largest drop since 2014. Reinsurers earned well through 2023-2025, alternative capital is at record levels, and five benign quarters strengthened every buyer’s hand. The broader soft market dynamics did the rest.

One of Europe’s most senior insurance executives thinks the industry is walking toward a cliff while cutting the toll.

There is no way to ‘adapt’ to temperatures beyond human tolerance ... Whole cities built on flood plains cannot simply pick up and move uphill.

Günther Thallinger, member of the board of management, Allianz SE, April 2025

Thallinger’s argument, made in an essay that went unusually viral for an insurance text, is that past certain warming levels entire regions stop being insurable at premiums anyone can pay, and that where insurance withdraws, mortgages and asset values follow. He had not softened by July 2026, saying in an interview on Europe’s heatwaves: “Certain locations and perils cannot be covered as we would wish them to be covered. We cannot help it.”

Both signals can be honest at once. A rate-on-line prices the next twelve months of variance, and over twelve months the capital markets may well be right; the WMO’s odds run to 2030 and beyond, a horizon no annual contract prices. Homeowners, lenders and balance sheets live on the longer clock. The mismatch between the two is where the strain shows.

Home Insurance Availability and the Protection Gap

It shows first where insurance is bought one year at a time: the home.

California’s FAIR Plan, the state’s insurer of last resort, held 696,560 policies and US$768 billion of exposure at 30 June 2026, with policies up 157% and exposure up 250% since September 2022. The January 2025 fires brought it roughly 5,400 claims and close to US$3.5 billion in payments, forcing a US$1 billion assessment on member insurers. A 29.1% average rate increase takes effect this October; the plan had asked for 35.8%.

US$768 billion of property risk now sits on a residual market that exists because the regular market said no.

The pattern is national. The US Senate Budget Committee’s December 2024 investigation, built on 249 million policy records, counted 1.9 million homeowner non-renewals between 2018 and 2023; by 2023, 48 of the 50 counties with the highest non-renewal rates carried elevated flood or wildfire risk. The list is no longer Florida, Louisiana and California: the committee’s data shows the same climb in the Carolinas, New England, Oklahoma and Hawaii.

The industry rejects the framing, and its rebuttal deserves to be quoted rather than paraphrased. Robert Hartwig, who ran the Insurance Information Institute and now teaches risk management at the University of South Carolina, answered that the market is “not in the midst of a climate-driven crisis nor is it about to ‘fall’” - dislocation, in his reading, not crisis, and concentrated in two states. David Sampson, chief executive of the American Property Casualty Insurance Association, named the other suspects: “Property insurance losses have been escalating and it’s not just the weather,” pointing to forty-year-high inflation, rebuilding costs, overbuilding in exposed places and legal system abuse.

Senator Sheldon Whitehouse’s committee re-ran its checks and stood by the correlation: areas with greater climate risk have higher non-renewal rates and higher premiums. The two readings are less opposed than they sound. Inflation and litigation set the level of losses; climate sets the direction. A homeowner’s premium is where every one of those pressures lands at once, which is exactly why insurance data has become the arena the climate argument is fought in.

Jerome Powell, running neither for office nor for market share, put the endpoint on the record in February 2025:

If you fast-forward 10 or 15 years, there are going to be regions of the country where you can’t get a mortgage.

Jerome Powell, Chair of the Federal Reserve, Senate Banking Committee testimony, February 2025

First Street’s Property Prices in Peril, published the same month, models where that leads: US$1.47 trillion off US residential property values by 2055, average premiums up 29.4%, Miami’s up 322%. Thirty-year model outputs deserve thirty-year scepticism. The direction, though, is already history - the non-renewal counts above are observed data, not forecast.

And the gap keeps its global scale: 51% of 2025’s catastrophe losses were uninsured, and that was the best insured share Swiss Re has ever recorded. In the first half of 2026, 60% went uncovered. The protection gap is the industry’s standing critique and, read differently, its standing product roadmap.

Opportunities and Future Insurance Products

A market repricing this hard is also a market with unmet demand, and three product families are already visible in the 2026 numbers.

Climate risk is moving to capital markets at record pace. Catastrophe bonds absorbed US$17.98 billion of new issuance in the first half of 2026, a record, taking the outstanding market to US$65.6 billion; nine sponsors came to market for the first time in the second quarter alone. The instrument has stopped being exotic. California’s FAIR Plan bought US$750 million of cat bond protection after the January 2025 fires - when a state’s residual insurer sponsors securitised climate risk, it has become ordinary plumbing.

Parametric covers are scaling at the opposite end of the market. India’s SEWA grew its heatwave income-protection cover from 21,000 members in 2023 to 225,000 across seven states in 2025, paying out automatically on temperature triggers instead of adjusting individual claims, and a Delhi rollout followed in 2026. Where that model genuinely fits, and where it does not, is the subject of our own piece on parametric insurance beyond catastrophe covers.

Loss prevention becomes the product

The third family changes the risk instead of transferring it.

Insurance has historically been bad at prevention, and the reason is structural rather than cultural. Policies last twelve months; a hardened roof pays back over decades; the carrier that funds a customer’s mitigation may be pricing a competitor’s future risk the year that customer switches. Three things broke that logjam at once: regulators forcing the discount, with California’s Safer from Wildfires rules making mitigation credits mandatory; certification making mitigation portable, since an IBHS designation travels with the house and any insurer can price it; and loss trends making prevention cheaper than settlement.

The field data now exists to justify it. When IBHS researchers walked the Palisades and Eaton burn zones, surveying more than 250 properties, homes with four hardening features - a Class A roof, noncombustible siding, double-pane windows and enclosed eaves - had a 54% likelihood of escaping damage. IBHS’s Wildfire Prepared Home designation has since spread from 4 to 14 states, with carriers such as Mercury attaching premium credits to the certificate.

Escape-of-water cover shows the finished version of the idea. LeakBot, distributed by eleven carriers including Admiral, Hiscox and Mapfre, pairs a leak sensor with a find-and-fix repair service; research across 366,000 device-years, published with the IoT Insurance Observatory in 2026, measures claims reductions of up to 70%, and Länsförsäkringar cut claims costs 40% within two years of rollout. Sensor, service, repriced policy. The same template transfers to flood, wildfire and heat, and it quietly redefines the trade: an insurer becomes a company that spends premium removing losses, not merely paying them.

Operationally, every product in this section is the same build. A new rating model, an external data feed, a trigger that starts a payout workflow without an adjuster. Whether a carrier can ship that in weeks or in quarters is becoming the competitive question, the argument our post on the future of insurance technology makes at length, and it is the problem Openkoda’s product builder exists to remove: rating factors, triggers and payout workflows are configuration rather than a replatforming project, so a parametric heat cover or a mitigation-verified discount can go live while the reinsurance quote behind it still stands.

The climate reports will keep arriving on schedule, and each has put the odds higher than the last. The soft market will not grant five benign quarters twice. Between June’s heatwave and the cheaper renewal quote that followed it sits the industry’s real position in 2026: cheap capacity, expensive physics, and a narrow window in which one can fund building for the other. The insurers spending the window that way are the ones the next set of odds will bother least.