UPDATE 10:46 p.m.:
The "Volcano" blaze was 75 percent contained Wednesday night, mapped at 350 acres, Cal Fre officials said.
A third firefighter suffered minor injuries, according to officials.
Full containment was expected early Thursday.
UPDATE 5:45 p.m.
Motorized equipment used to clear brush was blamed for starting a fire that consumed 400 acres Wednesday, burned down a home and injured two firefighters.
The so-called "Volcano" blaze late Wednesday afternoon was holding at 400 acres but containment was at 10 percent, with full containment not expected until Thursday morning.
Two firefighters suffered minor injuries; one was treated at the scene, the other was taken to a hospital, Cal Fire officials said.
UPDATE 5:29 p.m.:
A firefighter suffered minor injuries battling a 400-acre blaze in La Cresta Wednesday.
Cal Fire officials backed off their original 20 percent containment estimate and made it 10 percent.
Full containment was expected at 8 a.m. Thursday; full control, 6 p.m. Thursday.
The American Red Cross Wednesday afternoon opened a temporary shelter for residents who voluntarily evacuated their homes.
The shelter is at Murrieta Valley High School, 42200 Nighthawk Way.
A fire Wednesday raced through the Santa Rosa Plateau, gorging on 400 acres of brush and claiming at least one home, officials said.
The fire was reported about 11:30 a.m. at Tenaja Road, near Via Volcano and quickly spread at a moderate rate.
Firefighters late Wednesday afternoon had the blaze 20 percent contained; officials confirmed at least one structure fully involved in flames.
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