Fire-spreading Santa Ana winds will last until tonight in Southern California

The Santa Ana winds that are spreading large wildfires in Ventura and Los Angeles counties will continue blowing until at least tonight, and they’ll pick up force today in San Diego County, the National Weather Service says.

A red flag fire weather warning is in effect for most of San Diego, Orange, Los Angeles and Ventura counties. The warning will stay in effect until tonight.

Forecasters say a new round of Santa Anas will arrive on Sunday night.

The winds are pushing big wildfires in the Oak Park region of Ventura County and into the Agoura Hills in Los Angeles County, the Los Angeles Times reports.

The winds have generally been lighter in San Diego County. But forecasters say the winds will peak at 45 to 50 mph Friday in the county’s inland foothills and valleys, and in the mountains and lowlands of Camp Pendleton.

The wind is gusting to 50 mph in parts of Orange County.

Daytime highs across inland San Diego County will be in the 80s. The relative humidity will drop below 10 percent across most areas of the county.

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