Worsening wildfires in recent years have led officials to embrace planned fires to thin forests before disaster strikes. But the warming world is making it tougher to do safely.
A new study found that the dangerous pairing of disasters may become more common in the American West as rains trigger runaway surges of mud and debris in areas damaged by wildfire.
Residents of several municipalities in Boulder County were forced to flee. Hundreds of homes, a shopping center and a hotel burned as gusts reached 110 m.p.h.
