A rapidly spreading wildfire called the Ranch Fire ignited near Apple Valley, Southern California, on Tuesday afternoon, expanding to more than 4,200 acres by nightfall. Residents documented the High Desert blaze as it erupted south of Bowen Ranch Road and Coxey Truck Trail in Apple Valley.

Standing near horse trailers, members of the San Bernardino County Sheriff Phelan Posse 303 were positioned along Bear Valley Road ready to help evacuees. Posse members told the Daily Press they were waiting for sheriff’s dispatch to inform them about residents who needed help evacuating large animals.

Firefighters made progress battling a wind-driven brush fire burning in steep, rugged terrain south of Apple Valley overnight. The Ranch fire, which has burned through 4,205 acres of vegetation, is now 10% contained, the California Department of Forestry and Fire Protection announced Wednesday morning.