Fire crews checking on smoke billowing from a Clairemont canyon Wednesday discovered the source: A movie team with a smoke machine.
Several motorists called 911 about 7:10 a.m. to report heavy smoke from the canyon south of state Route 52 at the eastbound Genesee Avenue on-ramp, according to the California Highway Patrol.
CHP officers were imagining firefighters would have to cut through a chain-link fence to reach the canyon, a part of Marian Bear Memorial Park.
Within a couple of minutes, the smoke appeared to dissipate on its own, then billow up again.
Fire crews and the CHP discovered a movie production team was working with a smoke machine. They expected to use it periodically through the day.