The Valley Fire burning about 30 miles east of San Diego is now forcing school closures and new evacuation orders for people in the area near the community of Alpine.
Two people suffered injuries or illness according to fire officials, but did not provide information about their conditions. Cal Fire said Monday that the fire had destroyed 11 homes, with an additional 25 outbuildings that have burned as well.
On Sunday, California Governor Gavin Newsom declared a state of emergency for San Diego County.
The fire has now scorched 17,345 acres, according to Cal Fire officials. The fire, which started Saturday, is 3 percent contained.
A total of 374 firefighters battled the wildfire with equipment that included 56 engines, six bulldozers and seven water tenders.
Monday was the third day of extreme heat that firefighters faced as they continued the battle against the fast-moving fire. The National Weather Service in San Diego put out a Red Flag Warning that will be in effect until 8 p.m. Wednesday.