A brush fire burned 78 acres in the Lake Sherwood area of Ventura County Wednesday.
The Ventura County Fire Department was battling the blaze that broke out before 4:30 p.m.
No structures were threatened and no one had been injured, according to Capt. Mike Lindbery.
Firefighters were staying overnight to keep the flames from reaching the homes near Westlake Village and Thousand Oaks.
Firefighters are also concerned that the flames and smoke could damage major electric transmission lines.
The homes of celebrities -- like Jesse Money, the daughter of Eddie Money -- were threatened in the fire.
Ground crews are scrapping down the mountain sides, knocking down hot spots.
Firefighters said residents proved a huge help by clearing the brush from their homes.
Fire officials said more than 300 firefighters, six air tankers, and two helicopters were battling the blaze.
Potrero Road was to be closed between Westlake Boulevard and Lake Sherwood Drive, fire officials said.
The blaze was at zero percent containment by 7:30 p.m., Lindbery said.