The blaze erupted shortly before 12:30 p.m. local time and charred about 400 acres of drought-parched vegetation within three hours as flames roared through canyons and foothills in the Cherry Valley area, about 75 miles east of Los Angeles.
No property losses or injuries were reported but sheriff's deputies issued mandatory evacuation orders for the Highland Springs Village Mobile Home Park and dwellings in the nearby Banning Bench community to the northeast according to a spokeswoman for the California Department of Forestry and Fire Protection (Cal Fire).
The trailer park consists of roughly 200 homes, but the majority of the estimated 700 evacuees were from Banning Bench, the official added.
Aerial footage showed planes dropping fire retardant on the blaze as fire trucks surrounded a nearby mobile home.
More than 320 firefighters were initially assigned to the blaze, dubbed the Bogart Fire, with reinforcements expected to arrive soon.
The cause of the fire was under investigation.
The official said temperatures that had reached into the low-triple-digits earlier in the day had subsided somewhat, but humidity remained low and winds were relatively light, at 5 to 10 miles per hour.
Cal Fire reported about 12,000 firefighters battling about 10 other large fires across the state on Tuesday, most of which were largely contained or burning in remote areas.
To date this year, a total of 4,270 wildfires large and small have blackened more than 183,000 acres state-wide, 30,000 acres more than at the same time last year.
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