Jennifer Schulz, a spokeswoman for the Newport Beach Fire Department, said the blaze was contained in less than two hours, at 5:15 p.m. Monday.
Four helicopters dropped water and 15 firefighting units battled the blaze off Bonita Canyon Road.
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Schulz said authorities evacuated an unknown number of homes in the neighborhood east of San Miguel Drive. She says three streets were closed to car traffic so firefighters could clean up after the blaze.
Schulz said the fire was initially estimated to be 100 acres.