Fierce and Unpredictable: How Wildfires Became Infernos

In the wild, these fire whirls are unpredictable and dangerous. An exceptionally powerful whirl in late July during California’s unrelenting Carr Fire whipped winds up to 143 miles per hour, roaring and spinning for 90 minutes and scooping up ash, debris and flames. It uprooted trees, stripped the bark off them, and downed power lines. The whirl, sometimes nicknamed a “firenado,” was so large it was picked up on Doppler radar. At the Missoula Fire Sciences Laboratory, Dr. Finney and other researchers are recreating and studying whirls, as well as the paths that out-of-control blazes cut through millions of acres of forests and grassland in the West. The scientists are racing to develop a deeper understanding of the combined effects of a warmer climate, massive tree die-offs that feed the wildfires, and developments encroaching into the wilderness.