A SigAlert was declared by the California Highway Patrol just after 2 p.m. and authorities have shut down the 14 Freeway southbound at Golden Valley Road and north at Newhall Avenue.
An image posted by fire officials on Twitter showed two massive plumes of smoke swirling toward the sky over a blackened hilly landscape in the foothills of the San Gabriel Mountains. No injuries are reported.
Cal Fire is also assisting in the battle to extinguish the flames, a spokesman said.
Los Angeles County authorities say two juveniles found in a auto with guns and live ammunition told authorities they were attempting to take part in a kidnapping prank. The shelter was also able to house pets and larger animals, including horses, sheriff's officials said. Additionally, the area of Disney Ranch has experienced a power outage as a result, affecting 76 homes.
A traffic collision, Simms said, in the area spread to the nearby brush which started the fire. The 14 Freeway is closed in both directions and 60 firefighters have been dispatched to the scene, according to CBS.
Los Angeles County sheriff's Lt.
The wind-driven blaze reported Sunday along State Route 14 east of Santa Clarita quickly grew to about 750 acres.