Risk

Over the past two decades, a staggering 21.8 million Americans found themselves living within 3 miles (5 kilometers) of a large wildfire. Most of those residents would have had to evacuate, and many would have been exposed to smoke and emotional trauma from the fire. Nearly 600,000 of them were directly exposed to the fire, with their homes inside the wildfire perimeter. Those statistics reflect how the number of people directly exposed to wildfires more than doubled from 2000 to 2019, my team’s new research shows. But while commentators often blame the rising risk on homebuilders pushing deeper into the wildland areas, we found that the population growth in these high-risk areas explained only a small part of the increase in the number of people who were exposed to wildfires. Instead, three-quarters of this trend was driven by intense fires growing out of control and encroaching on existing communities. A wildfire in 2017 dest...

When the nation’s No. 1 and No. 4 property and casualty insurance companies – State Farm and Allstate – confirmed that they would stop issuing new home insurance policies in California, it may have been a shock but shouldn’t have been a surprise. It’s a trend Florida and other hurricane- and flood-prone states know well. Insurers have been retreating from high-risk, high-loss markets for years after catastrophic events. Hurricane Andrew’s unprecedented US$16 billion in insured losses across Florida in 1992 set off alarm bells. Multibillion-dollar disasters since then have left several insurers insolvent and pushed many others to reevaluate what they’re willing to insure. I co-direct the Center for Emergency Management and Homeland Security at Arizona State University, where I study disaster losses and manage the Spatial Hazard Events and Losses database (SHELDUS). As losses from natural hazards steadily increase, research shows it’...