The fire is raging for the fourth day but is only 5 percent contained so far.
The first major wildfire in southern California this year is raging for a fourth day East of Los Angeles, forcing thousands of people to leave their homes.
The fire in Riverside County is one of several fires that teams of firefighters are trying to deal with in the sweltering heat.
The fire in riverside, which began on Friday evening, covered an area of more than 100 square kilometers, covered with dry brush and forest.
As of Monday, the fire was contained only 5 percent of the perimeter.