A fire that erupted in Placer and El Dorado county timberland near the middle fork of the American River has grown to 350 acres after an aggressive attack from the air by fire retardant-dropping aircraft the day before.
As of 7 a.m. Wednesday, the California Department of Forestry and Fire Protection reported that the Trailhead Fire was 5 percent contained. It continued to burn in rugged forest off Drivers Flat Road near Todd Valley, along the middle fork of the American River in Placer County.
The fire started in a remote, rugged area that is difficult to access by ground crews.
As a result, air tankers dropping fire retardant and helicopters scooping buckets of water handled most of the attack.
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The fire is boxed in by lines of colorful fire retardant, but there is little containment of the blaze, Cal Fire reported. No cause for the fire has been determined.
More than 250 firefighters are battling the blaze. It was 100 degrees when the fire started, and firefighting personnel are expected to face torrid weather conditions again Wednesday.
About 250 personnel were battling the blaze with 48 engines, 6 bulldozers and three watertenders.
Mandatory evacuations were still in effect near Foresthill due to the wildfire, which started at midafternoon in the American River Canyon. A total of 400 structures are threatened by the wildland blaze.
Mandatory evacuations were ordered for Vinewood Court, Nugget Drive, Trailhead Court and Green Pine, according to the Placer County Sheriff's Office. Advisory evacuations were in effect on White Tail Court, Alton Trail, Grey Court and Tevis Court.
The American Red Cross has opened an evacuation center at Foresthill High School, 23319 Foresthill Road.
Large animals can be brought to the Gold Country Fairgrounds, 1273 High St., in Auburn, the Sheriff's Office reported.