The wildfire burning near Lake Hughes is 38% contained Tuesday morning and moving farther into the Angeles National Forest toward 100-year-old fuels consisting of Big Cone Douglas fir, Oak and Gray pine trees.
The fire has burned 19,026 acres since it began on Aug. 12 and destroyed 12 structures and 21 outbuildings, damaged three other structures and threatened 4,570 structures, according to the Los Angeles County Fire Department. Full containment is not expected until Sept. 2.
One person has been injured, but details of the injury were not disclosed.
The left flank of the fire in the area of Sawmill Mountain, Burnt Peak and Little Burnt Peak is presenting the most challenging fire behavior, the department said, adding containment along Pine Mountain Road will continue to be threatened by spot fires.
An excessive heat warning calling for temperatures between 98 and 110 degrees is in effect until 9 p.m. Thursday for the Santa Clarita, San Fernando and San Gabriel valleys.
“Crews will watch for fire whirls, or fire devils, a spinning vortex column of ascending hot air and gases rising from a fire,” the department said in a statement.
Fire commanders reported Monday that 1,894 firefighters were battling the blaze, along with 12 helicopters, 23 water tenders and 189 engines.
Evacuations remained in effect for the following areas: Lake Hughes Road west of Pine Canyon and north of Dry Gulch Road, east of Ridge Route Road, west of Lake Hughes Road and Fire Station 78, north of Pine Canyon and Lake Hughes Road, and south of state Route 138.
The evacuation site at Highland High School in Palmdale was closed at noon Monday, but officials said it would reopen if necessary. The Castaic Sports Complex evacuation center was closed Friday.
The American Red Cross said it would set up an additional evacuation center at the Antelope Valley Fairgrounds for people and small animals in Lancaster, if needed, and would also provide virtual assistance to affected residents. Large animals were being taken to the Antelope Valley Fairgrounds.
San Francisquito Canyon Road was reopened Monday, but road closures remained in place on Three Points Road from state Route 138 to Pine Canyon, Old Ridge Route from Highway 138 to Pine Canyon, and Pine Canyon Road from Ridge Route Road to Lake Hughes Road.
Poor air quality in and around the area of the fire was expected to affect the public and first responders.
The fire was first reported about 3:30 p.m. Wednesday near North Lake Hughes Road and Pine Canyon Road in the Angeles National Forest, according to the U. S. Forest Service, which was battling the blaze with Los Angeles County Fire Department crews and assistance from the Los Angeles, Culver City, Beverly Hills, Monterey Park, Long Beach and Santa Monica fire departments.
“There have been areas of this fire that have not burned in decades, (and) it’s in inaccessible terrain, which has added to the complexity of the fire,” said Los Angeles County Fire Department Chief Daryl Osby.
Although some structures were lost, a number of structures were saved by firefighters, he said.
The Angeles National Forest, LACFD, Los Angeles County Sheriff’s Department, California Highway Patrol and many other cooperating agencies were working together to battle the fire, with the Incident Command Post located in the Castaic Lake Recreation Area.
Castaic Lake remains closed to public access until further notice. Fire personnel are using the lake and surrounding areas as a base camp.
The cause of the fire remains under investigation.