Much-need rain has begun to fall over Southern California, bringing relief to the drought-stricken region but also the threat of toxic runoff.

Burn scars from the wildfires in Los Angeles County, California are creating the conditions for mudslides as heavy rain hits the state's south on Sunday. Lack of water absorption in the scorched soil is turning rain into runoff.

Southern California is expecting up to an inch of rain in some parts, aiding the fight against wildfires but also causing landslides that threaten homes in Los Angeles area. NBC News' Steve Patterson reports on the anxieties residents face as they try to resettle.