About 100 firefighters responded Monday afternoon to a 100-acre vegetation fire near Ramona that at one point threatened structures, burning in the northeast direction toward the San Diego Country Estates, authorities said.
The fire was first reported at 3:07 p.m. and forced California Highway Patrol to issue a Sig Alert on Wildcat Canyon Road between San Vincente Road and Willow Road.
As of about 4:30 p.m., the fire, which burned on a hillside above homes, had been knocked down.
Its cause is under investigation. There was no report of injuries or structures burned.
A total of 10 engines, four fire crews, two airtankers, three helicopters, one bulldozer, two water tenders and three chief officers were deployed to contain the fire.