Firefighters on Monday morning continued to make progress against a brush fire that destroyed six structures and scorched 300 acres in the Castaic area, officials said.
The so-called Warm Fire was initially believed to have consumed 500 acres, but that figure was reduced after the burn area was mapped by Angeles National Forest aircraft, according to the Los Angeles County Fire Department.
By 4 p.m. on Monday, the blaze was 50 percent contained, the U.S. Forest Service reported. Roughly 170 firefighters were continuing to battle the 300-acre blaze, which was fueled primarily by heavy brush.
Fire crews initially responded Sunday afternoon to flames near Lake Hughes and Dry Gulch roads.
The fire destroyed three structures at the Warm Springs Rehabilitation Center, which was vacant and not in use, according to a spokesman for the Santa Clarita Valley Sheriff’s Department.
Three other non-residential structures were also burned, the Fire Department said. No homes were believed to be threatened.
The fire prompted the closure of Lake Hughes Road at Elizabeth Lake.
Firefighters were battling flames in steep, dry terrain, amid temperatures that the National Weather Service said were above 100 degrees. Conditions were forecast to be only slightly cooler Monday.
The Warm Fire was one of three blazes in Los Angeles County on Sunday, along with the Lincoln Fire in the Montebello area and the 1,400-acre Cabin Fire in the Angeles National Forest above Glendora.
At least three firefighters were hospitalized while battling the blaze -- two for heat-related issues and a third for a leg injury, according to fire department spokesman Marc Peebles.
The cause of the blaze was under investigation.