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Illustration: Aïda Amer/Axios

To keep up with California's unrelenting wildfire threat, some insurers are now turning to AI to predict fire risk with unprecedented, structure-by-structure detail.

Why it matters: This will allow them to cover homes in areas that they would otherwise have passed over — but potentially at the cost of hiking rates for those who can least afford it.

The big picture: Spooked by a recent surge in destructive fires that shows no sign of cooling off, insurers have backed away from underwriting in the most flammable parts of the state. They say the risk is sky-high, and there's too much uncertainty about where fire will strike next and what it will consume.

Now, some insurers are getting creative. They are trying to pack in as much data as possible: information from building permits, records and codes — and, increasingly, satellite photos and aerial imagery from drones and aircraft.

  • Automatically analyzing super-detailed, top-down images helps insurers understand crucial, property-specific risk factors.
  • Some important ones: how close a house is to vegetation, how flammable that brush is and what the house's roof is made of.

Driving the news: MetLife announced this week that it's working with a Bay Area startup, Zesty.ai, to use this type of data for property-level scoring.

  • Zesty.ai predicts risk based on building information, aerial imagery, patterns gleaned from examining decades of wildfires and data from fire scientists.
  • MetLife has been extra conservative in fire areas, VP Carol Anderson tells Axios, in part because it has relied on traditional maps to assess risk.
  • When MetLife implements the new scoring system early next year, it hopes to bring in new customers and retain old ones, Anderson says.

Several startups have popped up to sell these new models to insurers, and some of the old guard are developing them, too.

  • About half a dozen companies have already met with CDI about their new models, according to Ken Allen, deputy commissioner for rate regulation.
  • And insurers, at an inflection point in how they approach fire risk, are increasingly interested, says Janet Ruiz of the Insurance Information Institute, an industry association.

But, but, but: Experts worry that property-level scoring can result in higher premiums for people living in high-risk areas, who are often on low or fixed incomes.

  • Low-income homeowners may be unable to afford property updates that would drive risk factors down, like replacing roofing or clearing trees. And if rates go up, their property values could go down in response.
  • New, more granular models could drive a bigger wedge between premiums, says Allen of the Department of Insurance, "so high risk pay more and lower risk pay less."
  • "We are seeing insurance companies over-rely on technology, and the consumers are paying the price," says Emily Rogan of United Policyholders, a nonprofit that advocates for insurance customers.

What they're saying: "MetLife follows standard actuarial principles for ratemaking to ensure our rates are not excessive, inadequate or unfairly discriminatory," a spokesperson told Axios.

  • Zesty.ai founder Attila Toth argues that it ultimately falls on regulators, not his company, to make sure that its risk models don't discriminate. But in a report last year, CDI said it "does not have the necessary authority to regulate how insurers underwrite residential property insurance."
  • After this story was published, Toth shared the summary of an outside auditor's report that analyzed the Zesty.ai fire risk model and concluded that, if applied properly, it would not "result in rates that are unfairly discriminatory."

The bottom line: "Moving to risk-based rates is overall a positive thing to do, but it could have a negative effect on people currently in these high-risk areas," says Lloyd Dixon, a RAND researcher who last year published a detailed study of wildfire's impact on insurance in California.

Go deeper: Deciding whether to rebuild after fire

Editor's note: This story has been updated with details on the Zesty.ai actuarial report.

Go deeper

Hill votes will make global waves

President Biden addresses the UN General Assembly on Sept. 21, 2021 in New York City. Photo: Eduardo Munoz-Pool/Getty Images)

This epic week for President Biden on Capitol Hill is even bigger than his domestic agenda.

Why it matters: Biden has anchored his entire strategy for foreign affairs on the notion that "America is back." What that means in practice is that Biden needs to prove democracy works to rally America’s liberal allies against rising authoritarians.

2 hours ago - World

German election: Exit polls show close race to succeed Angela Merkel

SPD leader Olaf Scholz. Photo: Alex Kraus/Bloomberg via Getty Images

BERLIN — The first exit poll from Sunday's German elections showed the center-left Social Democrats (SPD) and the center-right Christian Democrats (CDU) in a dead heat at 25%, leaving the race to succeed Angela Merkel too close to call.

The state of play: A second exit poll showed the SPD narrowly ahead. That's the one televisions displayed at SPD headquarters in Berlin, where the room erupted into cheers. Official results will roll in throughout the evening.

Abbott says he'll hire Border Patrol agents on horseback

Texas Gov. Greg Abbott (R) on Sunday defended the actions of U.S. Border Patrol agents who charged at Haitian migrants on horseback, blaming the Biden administration for not preventing them from crossing the border.

Why it matters: Abbott's remark on "Fox News Sunday" comes amid increased backlash over the incident, with President Biden saying, "I promise... those people will pay,” and the Department of Homeland Security launching an investigation.