Southern California was forecast to face more dangerous winds on Wednesday, but could get some badly needed rain this weekend, which could create new challenges like toxic ash runoff.

LOS ANGELES (AP) — After weeks of windy and dry weather, rain has fallen in parched Southern California and is expected to aid firefighters who are mopping up multiple wildfires. But potentially heavy downpours on charred hillsides could bring new troubles such as toxic ash runoff.

Mudflows prompted the closures of at least some roads, including in Topanga Canyon and on parts of the Pacific Coast Highway.