Monday's red-flag warning is a PDS, which stands for "particularly dangerous situation." But what does that mean? An NWS meteorologist explains.

Firefighters in the San Fernando Valley are responding to a brush fire in Sylmar as crews in Pacific Palisades and Altadena battle other brush fires that have triggered evacuation orders in their respective areas.

Firefighters were slowly making progress in their battle to contain the inferno that has razed swathes of Los Angeles' Pacific Palisades neighborhood to the ground, but still-spreading flames threatened communities in the populous San Fernando Valley on Sunday.

Thousands of firefighters were battling at least three separate blazes on Wednesday, from the Pacific Coast inland to Pasadena. Track them live.

Meteorologists said there was a chance the winds would be as severe as those that fueled the Palisades and Eaton fires, but that different locations would likely be affected.

The Santa Ana wind forecast for Southern California has worsened, and forecasters now expect to issue a red flag fire weather warning starting Monday.

Gusts of up to 70 mph are possible along the coast and valleys, and in the mountains, up to 100 mph, the National Weather Service said. Parts of L.A. County, and most of Ventura County, are at highest risk.

We’re tracking the fires in Los Angeles, California. See maps of recently burned areas and key locations in the vicinity of the fire.

A "particularly dangerous situation warning'' has been issued for L.A. and Ventura counties due to dangerous winds and very low humidity.

Fire officials have deployed all available resources and prepositioned crews in fire-prone areas as much of Southern California remains under a red flag warning

A particularly dangerous situation red flag warning is in place from noon Monday to 10 a.m. PT Tuesday for a large portion of Ventura and Los Angeles counties.