The Detwiler fire in Mariposa surged from 2,500 to 7,100 acres overnight, the Mariposa County Fire Department reported.
The fast-moving fire forced residents’ evacuation from the area near Lake McClure on Sunday evening.
Evacuations and road closures remain in effect on portions of Hunters Valley Road, Hunters Valley Mountain Access Road, Bear Valley Road, and portions of Highway 49.
There is a Red Cross shelter for residents and small animals at the Mariposa Elementary School, 5044 Jones Street in Mariposa.
For the latest road closure and evacuation information, call (209) 966-1133
The cause of the fire is under investigation.