As the sun began to set over Castaic Lake on Wednesday, the hills to the north and east were engulfed in flames, casting an eerie orange glow across the valley below.

A hard-charging brush fire erupted in northern Los Angeles County on Wednesday, hustling through 9,400 acres of terrain so far, aided by heavy, dry brush and pushed by gusting Santa Ana winds, Cal Fire officials said.

Firefighters are responding to a brush fire in the Castaic area of Los Angeles County Wednesday morning, according to the Angeles National Forest.