FRAZIER PARK, Calif. (KTLA) — The Grand Fire burning in the Frazier Park area was 35 percent contained on Friday, fire officials said.
The blaze, which broke out around 12:40 p.m. on Wednesday, has burned 4,100 acres, according to an update from Cal Fire.
There were 1,452 personnel from multiple agencies assigned to the fire, along with 65 engines and seven helicopters.
Firefighters were continuing to work to build a fire line around the perimeter of the blaze.
With help from lower temperatures and higher humidity, they were making progress on the southern and northern sides of the fire, officials said.
Hungry Valley State Park and Piru Creek recreation area remained closed, along with the roads leading into those areas.
The fire threatened six structures, but none have been destroyed. There were also no reports of any injuries.
Officials did not have an estimate on when the fire would be fully contained.
The cause of the fire remained under investigation.