The so-called Holy fire in southern California’s Cleveland National Forest has spread over 10,200 acres, doubling in size since Wednesday night.
Hot weather and draught conditions have caused the fires to spread in California, forcing 20,000 homes to be evacuated.
Lake Elsinore mayor Natasha Johnson said the blaze has been “devastating”. She told CBS: “We can’t control fire.
“We can do our best to protect, but this is heartbreaking and devastating.»
Everything else is replaceable but your life is not
Ms Johnson is also insisting residents must not ignore calls to evacuate. She said: “Nothing is worth it. Grab your things, grab your family, grab your valuables, and move.
“Everything else is replaceable but your life is not.”
In an effort to control the blaze, planes have been dropping fire retardant, a substance used to slow the spread of the fire and reduce its intensity.
Shocking video footage from CBS News shows the moment a plane drops pink fire retardant over the edge of a hill to stop the fire spreading even further.
But as the fire crews were attempting to control the blaze from reaching homes on top of the hill, the camera pans left and the flames can be seen rising over the hilltop, which appears to be dangerously close to the house.
The fire started on Monday afternoon near the Riverside and Orange County border in Cleveland National Forest.
The Holy fire increased in size near the Horsethief Canyon area on Wednesday and then jumped the North Main Divide dirt road, burning into the Lake Elsinore area of Riverside County.
As the blaze headed toward the Lake Elsinore area, communities to the northwest of the lake in Riverside County were urged to flee their homes.
Thanh Nguyen, a spokesman for the fire crews said: “Our main focus this afternoon was getting everyone out safely.”
The McVicker Canyon, Rice Canyon, Horsethief Canyon, El Cariso, Rancho Capistrano, Blue Jay, Indian Canyon, Glen Eden, Sycamore Creek and Mayhew Canyon communities are under mandatory evacuation orders.
The fire is so far just five percent contained, despite the effort from firefighters to control the blaze with daylong drops by more than a dozen firefighting aircraft.