Why the Insurance Industry Isn’t Prepared for the Costly Risks of Climate Change

Take property underwriting, for example. Insuring against weather and climate disasters is complex: traditional homeowners insurance covers most types of severe weather but not floods or earthquakes, which require separate policies. Those separate policies, including a common one called catastrophe insurance, come with a higher price tag. Insurers face challenges in balancing the statistical risks of disasters, the potential payouts involved, and consumer demand for policies, which rarely align. (One key is diversification: In order to be able to pay claims from the highest-cost disasters, typically windstorms and earthquakes in the U.S., Japan and Europe, an insurer needs to do enough business elsewhere or set aside enough capital to pay for potential claims.)

However, climate change exacerbates these challenges. Insurers’ models for the cost of disasters are based on historical data, but those trends are shifting in unpredictable ways as the climate warms. A warmer atmosphere, for instance, is able to carry more moisture, which means storms move slower and carry more precipitation, leading to massive and costly flooding, as seen in China and Germany last month.

Insurance companies often then turn to reinsurers — companies where insurance companies get their own insurance. Despite representing only 5% or so of the $7 trillion in gross premiums written by the industry each year, reinsurers use their global reach and huge balance sheets to cover as much as two-thirds of the losses from major events.

Risk — identifying, modeling, and managing it — is core to the insurance industry. Climate change poses great long-term and increasingly short-term risk. As a result, insurers are investing significantly in building state-of-the-art climate models to better understand global warming’s impact, as well as rebalancing their premiums and pricing strategies to account for these shifts.

Indeed, Swiss Re predicted that climate-related risks would account for just over a fifth of the overall rise in property premiums over the next two decades. That’s as much as $183bn to annual premiums for property insurance by 2040.

And it is not just property and casualty insurance that’s being reevaluated. Climate change is also leaking into life insurance risk, directors and officers risk, and other areas.

If it becomes too expensive to cover losses, insurers and reinsurers will raise prices and pull back toward areas that are more profitable. Swiss Re AG, the world’s largest natural catastrophe reinsurer, said last year it had started paring back parts of its portfolio with high exposure to climate risks, and is raising its modeled risks associated with weather events in Australia, typhoons in Japan and wildfires in California.

That can increase the costs of coverage for primary insurers and customers down the chain — and low- or middle-income people might not be able to afford it.

The reality of the climate crisis is that no one group can afford to shoulder its costs. Insurers will have to continue to adapt their risk forecasts, premium structures, investment strategies, and claims handling practices to remain competitive in a market increasingly complicated by climate change.