Firefighters worked through Tuesday night and Wednesday to try to contain the Walker Fire, which had grown to 1,100 acres.
Cal Fire said Wednesday night the fire was 35 percent contained and forward spread had been stopped.
“Firefighters have been staging line all day,” Cal Fire spokesperson Emily Kilgore said Wednesday afternoon.
They were particularly concerned with the conditions, with winds picking up amid dry conditions.
Winds from the north overnight moved the fire towards Hunt Road. It started on Walker Trail Road near Hogan Dam Road in the Salt Springs area.
Two out buildings were destroyed during the night in the rural community south of New Hogan Lake and north of Copperopolis.
Kilgore said in a release the fire, which is moving in a southerly direction, was threatening about 50 structures.
The Calaveras County Sheriff’s Office issued warnings to people living in Circle 20 that they may have to evacuate, but lifted the order Wednesday night.
Two temporary evacuation sites were established by the Red Cross Wednesday.
They are not overnight shelters and are located at the Copperopolis Armory/Community Center at 695 Main St., Copperopolis, and Mountain Oaks School: 150 Oak St. off Pool Station Road, San Andreas.
Snacks, water and blankets, PPE and screening equipment are on site.
The Tuesday night update said the fire was at 1,000 acres with zero percent containment. Cal Fire TCU said 415 firefighters were on scene and more were responding as the fire spread south at a critical rate.
It began sometime after 5 p.m. in a remote area south of New Hogan Lake and north of Copperopolis.
Kilgore said more firefighters and equipment moved into the area during the day but Wednesday started with 10 engines, 13 water tenders, 13 dozers, eight handcrews and various aircraft.