3Qs: What sparked the Tennessee wildfires?

Wild­fires raged recently through the foothills of Tennessee’s Great Smoky Moun­tains, dam­aging more than 1,400 struc­tures and killing 14 people. Last week, two juve­niles were charged with aggra­vated arson in con­nec­tion with them. Northeastern’s Auroop Gan­guly, an expert on cli­mate extremes, notes that the “chain of causality” in such events is com­plex, with human activity sig­nif­i­cant but other fac­tors, including cli­mate change, also playing a role.