Two wildfires ignited early Tuesday in San Diego, California's Department of Forestry and Fire Protection said. The Lilac Fire had burned about 20 acres at a moderate rate of speed and was zero percent contained, Cal Fire’s San Diego department said in a statement posted on social media.

Rain and cooler temperatures will bring relief to Southern California this weekend, after a prolonged stretch of dry, breezy weather that allowed wildfires to thrive.

More rain fell Monday on parts of Southern California after causing mudflows over the weekend, helping firefighters but boosting the risk of toxic ash runoff in areas scorched by Los Angeles-area wildfires.