Wildfire is a prevalent risk to homeowners in the West. But quantifying the risk of wildfires has until now been more difficult than floods, for instance, because of their nature. Wildfires spread rapidly, the wind can move embers and sparks long distances, catching on trees and buildings.
On Monday, nonprofit First Street Foundation released a nationwide wildfire risk assessment
— a massive trove of data that shows homeowners and business owners how at-risk their property is to wildfire. The data
will be integrated into Realtor.com, so that prospective buyers can see what their fire risk for any given property is.
First Street found that nearly 80 million properties are at some risk of wildfire, ranging from minor (less than a 1% chance of wildfire damage over 30 years) to extreme (more than 26% chance of wildfire damage over 30 years).
While the vast majority of those — 49 million — are at minor risk, more than 4 million properties are at severe or extreme risk.
Many of the properties with the highest wildfire risk are in the West, where scientists say hot and dry conditions are exacerbated by human-made climate change
. But First Street also found that risk will increase both in the West and other parts of the country over the next 30 years.
"Homes that have wildfire risk today, their risk roughly doubles over a 30-year period because the climate is warming; fuels are drying," Eby told CNN.
Wildfire risk is growing
Outside experts who reviewed First Street's nationwide risk assessment told CNN the assessment holds up with what they're seeing: Western states as well as those in the Plains are experiencing drier and hotter weather, which dries out vegetation and creates more fuel for fire.
"The hazard is increasing because burn probabilities are going up," said Dave Sapsis, a wildland fire scientist at Cal Fire. "There's more fuel, the fuels are highly desiccated because we're in protracted droughts.
"There's also more [property] that's out there in the way to get impacted."