Two fires erupted in the San Diego area on Thursday afternoon, prompting evacuations. The Border 2 Fire, which broke out in the Otay Mountain Wilderness area east of Chula Vista and north of the U.S.-Mexico border, has burned approximately 4,250 acres, according to the California Department of Forestry and Fire Protection.

Over 1,100 firefighters were “strategically pre-positioned” across Southern California to address "ongoing critical fire weather," Cal Fire said.

A critical fire threat will continue across County as Santa Ana winds and dry conditions persist through early Friday, according to the National Weather Service.

Firefighters continue to battle multiple fires that broke out this month, destroying more than 16,000 structures and leaving at least 28 dead.