More than 100 firefighters are battling a large blaze Sunday in Silverado, an unincorporated area of southeast Orange County, authorities said.
The fire started about 10:10 a.m. in a large mulch pile at a nursery in the 27900 block of Baker Canyon Road, said Orange County Fire Authority Capt. Steve Concialdi.
The area is near the edge of the Cleveland National Forest.
Concialdi said the fire spread despite efforts to keep the flames in check. He said the blaze was driven by steady Santa Ana winds of about 10 mph and that conditions were dry, with relative humidity at a low 7%.
About 125 firefighters were battling the flames. Concialdi said he did not know the exact size of the fire.