Power to tens of thousands of people had been shut off by Monday night as utilities worked to mitigate the impacts of Southern California's notorious Santa Ana winds, whose strong gusts could damage electrical equipment and spark wildfires.

A rare "particularly dangerous situation" red flag warning is in effect for much of Los Angeles and Ventura Counties Monday night through Tuesday as powerful Santa Ana winds intensify. Threat level: The National Weather Service and local law enforcement are urging residents to be prepared to evacuate should any wildfires ignite,