The Snow Fire burning northwest of Palm Springs was 80% contained Friday morning, with much of the fire activity confined to pockets of remote wilderness away from residential areas.
The fire has blackened 6,254 acres since igniting on Sept. 17 in the 15000 block of Snow Creek Road, according to the Riverside County Fire Department.
Firefighters were expected to have containment lines dug around the fire's entire perimeter by Oct. 1.
The cause of the blaze has not been officially determined, although the California Highway Patrol reported that a work truck caught fire about 2:40 p.m. near Snow Creek Village, and the fire spread to nearby vegetation. "We do know that there was a car there, but other than that, we don't know how it happened," U.S. Forest Service spokeswoman DeLyn Sieliet said.
Sieliet said Cal Fire and the Riverside County Sheriff's Department were handling the investigation.