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,

Santa Ana winds will bring the "highest possible" fire danger to the majority of Los Angeles and Ventura counties through Wednesday, according to the National Weather Service.