Firefighters battled a brush fire reported Monday afternoon in Lancaster.

The fire, dubbed the Isaac Fire, was reported shortly after 1:20 p.m. between 70th Street and West Avenue, according to the Los Angeles County Fire Department.

By 2 p.m., the fire had burned 100 acres.

Two other fires were also reported in Southern California. The Sandy Fire has burned more than 700 acres and is threatening a residential area, while the Burro Fire has burned 35 acres in the Angeles National Forest.

2ND ALARM BRUSH FIRE | FS130 | N 70th St W & W Avenue I #Lancaster | At approx 1:26 p.m. #LACoFD responded to a fire in the area. Currently the fire is at 100 acres and crews are still working on containment. #IsaacFire

— L.A. County Fire Department (@LACoFDPIO) May 18, 2026