A wildfire in the Grimes Greek area has burned four structures including three cabins, forced evacuations and sent smoke pouring into the Treasure Valley; at 6 a.m. Monday, air quality in Boise was rated in the “moderate” range, but it looks, and smells, pretty bad. The 2,500-acre blaze was first reported Saturday afternoon; the Idaho Department of Lands is coordinating the firefighting effort.

Dozens of homes are under evacuation; campers in the area also have been told to leave. The fire's spread shows how dry conditions in Idaho remain, even into mid-October. KTVB-TV reported that investigators believe the fire was started by someone camping in the area. UPDATE: At 10 a.m, pollution levels in Boise had soared up into the unhealthy range, with an air quality index of 180.