OREGON STATE UNIVERSITY

After the Napa fires, a disaster-in-waiting: Toxic Ash

“Naturally occurring, lower-severity fires can have positive impacts,” says Kevin Bladon, a forest ecohydrologist at Oregon State University. The fires free up organic carbon and put nutrients like nitrogen and phosphorous into play. “But the really large, high-severity megafires that we’ve started to observe push the systems in a lot of cases too far.”