Wildfires Followed by Severe Rain Will Become More Common
Graphics show how the two weather extremes will more often pair up
Climate change tends to bring out the worst in the weather, be it extreme cold or heat, rain or fire. A new study found that the warming atmosphere increases the likelihood that a wildfire in the Western U.S. will be followed by intense rainfall. This confluence of events raises the risk of landslides and flash floods.
“Once you’ve had a wildfire burn through, you kill off all the vegetation, and you don’t have any root structures there holding the soil in place, so it’s a lot more vulnerable,” says University of California, Santa Barbara, climate scientist Samantha Stevenson, who was a co-author on the study.
The fires aren’t causing the storms, but the same rising temperatures that lead fires to become more severe allow the atmosphere to carry more moisture, causing rain events to dump more water quickly. “We’re talking about superstrong rainstorms, the 99.9th percentile,” Stevenson says.
This article was originally published with the title “Wild Weather” in Scientific American 327, 1, 80 (July 2022)
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