A fire near Mt. Diablo, about 35 miles east of Oakland, has grown past 800 acres and is 10 percent contained, according to Cal Fire. The fire is still growing.
A strike team of engines from San Ramon Valley Fire and the Contra Costa County Fire Protection District responded for structure protection.
The response includes: 25 engines, 4 air tankers, 2 helicopters, 6 crews, 4 bulldozers, per CalFire.
About 50-75 structures are threatened by the fire.
Homes on Curry Canyon Road and Oak Hill Lane are under mandatory evacuation. Some homeowners were on top of their roofs spraying them down.