The town of Wrightwood is being evacuated as San Bernardino County Fire crews continue to battle the Sheep Fire, which has consumed 7,500 acres.

Some 4,000 residents, practically the entire population of Wrightwood, are now under mandatory evacuations, San Bernardino County Fire officials said.

The fire, which as been burning since Saturday afternoon was 20 percent contained as of 7 p.m., officials said.