Heavy overnight rain sent mud flowing onto the Pacific Coast Highway, leading to a full shutdown of the highway between Malibu and Santa Monica Friday, authorities said.

The second in a pair of back-to-back storm systems moved across Southern California overnight, triggering small mudslides in the Palisades Fire burn area and keeping public works crews and first responders on alert.

The Pacific Coast Highway is back open in Malibu, California, nearly a month after the deadly Palisades Fire ripped through hillside Los Angeles neighborhoods, destroying properties all the way down to the beach.

PCH's closure has severely disrupted local transportation networks and emergency response capabilities across Los Angeles County.

Efforts are well underway to clean up debris flows caused by storms that rolled through SoCal as well as mitigate damage that could potentially be caused by future rainfall. Back-to-back days of precipitation triggered mud and debris flows along Pacific Coast Highway in Malibu and the Pacific Palisades as Thursday turned to Friday,