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.

Just a day after fully reopening for the first time in weeks, Pacific Coast Highway will close again Tuesday in anticipation of back-to-back storms set to roll through Southern California that could potentially cause landslides in areas recently burned by the Palisades Fire.

Malibu’s Pacific Coast Highway, which just reopened after last month’s devastating Palisades Fire, is closing again Tuesday due to concerns about potential mudslides, landslides and

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,