Strong winds and low relative humidity levels are bringing increased fire danger to Southern California.
Northerly winds whipped up late Wednesday, buffeting parts of Los Angeles County with gusts topping 50 mph.
NBCLA reports that strong gusts toppled trees in South Los Angeles and the San Fernando Valley, and knocked out power to hundreds. Southern California Edison's website lists dozens of outages around L.A. County. You can check outages using their outage map.
The National Weather Service says potentially stronger winds are expected Thursday night as what's being called the first significant wind event as the Santa Ana season begins.
"We're going to start to see the wind shift to the northeast, more of a typical Santa Ana event with the wind peaking overnight through tomorrow morning," meteorologist Scott Sukup told KPCC.
Foothill and valley areas could experience winds about 35 to 45 mph, with possible isolated gusts of around 50 mph. A red flag warning will be in effect in L.A. and Ventura counties on Friday from 4 a.m. to 6 p.m.
Drivers are urged to use caution in mountain areas as Thursday's winds, which could reach up to 50 mph, approach.
Humidity levels are predicted to slip into the teens. A less serious fire weather watch is in effect in the San Gabriel mountains through Friday.
Some communities will station additional crews in danger areas to deal with increased fire risk.
This story has been updated.