The Valley Fire is located off Highway 21 and Highland Valley, about one mile east of Boise on the north side of the highway.

Residents react to the Valley fire burning thousands of acres in the Boise foothills. The huge plumes of smoke are visible from across the Treasure Valley.

The department said on X, formerly Twitter, that crews were conducting “proactive fire operations” so they could protect the containment lines that had been set up around the growing Valley Fire. Boise Fire said it appreciated the “concerned calls” but wanted to assure residents they weren’t seeing a change in the fire’s behavior toward the city.