Riverside, San Bernardino, Orange and San Diego counties are under an updated flood advisory which was issued by the National Weather Service on Thursday at 10:36 p.m. The advisory is in effect until Friday Nov. 21, at 1:33 a.m.

The NWS San Diego CA said, “Flooding caused by excessive rainfall is expected.”

“Minor flooding in low-lying and poor drainage areas,” the NWS said. “Turn around, don’t drown when encountering flooded roads. Most flood deaths occur in vehicles.”

Your guide to weather alerts: advisories, watches, and warnings

Flash flood warning: Take action!

A flash flood warning is issued when a flash flood is imminent or occurring. If you are in a flood-prone area, move immediately to high ground. A flash flood is a sudden violent flood that can take from minutes to hours

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