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,

Forecasters are warning of a fire weather watch in parts of San Diego County beginning Monday morning. The National Weather Service alert, through Tuesday night, affects county inland valleys and mountains, including the Palomar and Descanso Ranger Districts of the Cleveland National Forest.

Portions of Riverside County mountain areas under red-flag warning with Santa Ana winds creating 'strong and possibly damaging' wind event.