Rain fell on parts of Southern California on Sunday and the scattered showers were expected to continue overnight, boosting the risk of toxic ash runoff in areas scorched by Los Angeles-area wildfires.

Rains have finally arrived in Southern California, aiding firefighting efforts in the region. However, the weather also raises new concerns about potential mudslides and toxic runoff on burn-scarred hillsides.

Southern California is about to get its first significant rainfall in months, bringing desperately needed relief after dry conditions and hazardous winds fueled a series of wildfires in January. The rain could start as early as Saturday afternoon and last through Monday night with the heaviest rain coming on Sunday,

Drought-ravaged Los Angeles, still battling the remnants of a series of devastating wildfires, will receive significant rainfall beginning Saturday but a new threat of flooding in burn-scarred areas has emerged.