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 debris flows from a prolonged atmospheric river event.

The second peak of an ongoing atmospheric river storm arrived in Northern California Monday afternoon, prompting flood watches and a winter storm warning up in the Sierra.

Here's a look at rain, snow and roadway flooding in Northern California on Feb. 4 at noon. This report also has the forecast.

While the wet weather may bring an end to a devastating run of wildfires in the state, it could also cause flooding and other hazards.

The West Coast is in the middle of a long-lasting and potent atmospheric river event, which will bring days of heavy rain and mountain snow throughout the week ahead.