Periodically the area has been subject to wildfires that force thousands to evacuate . The most recent are the December 2017 Lilac Fire and the May 2014 San Diego County wildfires ; before them was the Witch Creek Fire in 2007 and the Cedar Fire in 2003 . California defines a fire season in which fires are most likely to occur , usually between late July and late October ( which are the driest months of the area ) . Signs posted in numerous spots of the county provide information on the level of threats from fires based on weather conditions
Lilac Fire
Lilac Fire
San Diego County, California