The Mountain Fire started Wednesday morning in Ventura County.
The Mountain Fire prompted evacuation orders Wednesday for more than 10,000 people in suburban communities.
The 281,893 acre Thomas Fire in southern California is now 100% contained, after starting on December 4th. The fire remains under investigation.
Firefighters are close to completing containment lines around the remnants of the huge and costly wildfire that scorched two Southern California counties this month.
The worst appears to be over for a massive wildfire that plagued a wide swath of the Southern California coast for 2 ½ weeks.
Crews taking advantage of calm winds will perform a controlled burn to remove swaths of dry brush as they build containment lines around Southern California's enormous wildfire.
The firefighter was a CAL FIRE Engineer from the San Diego Unit.