What to Know
The strongest winds will be across eastern Ventura and western Los Angeles counties
Wind are expected to decrease by this evening, calming down for trick-or-treaters
Temperatures will rise into the 80s in some areas
A red flag warning will be in force for much of Wednesday in mountain, forest and valley areas of Los Angeles and Ventura Counties because of gusty Santa Ana winds and little humidity, which will dip to single digits in some areas.
The strongest winds will be across eastern Ventura and western Los Angeles counties. Expect warm gusts of 35 to 50 miles per hour.
Gusts are expected to decrease by the time trick-or-treaters make their rounds.
"The wind is going to die down this afternoon," said NBC4 forecaster Shann Mendiola. "We should be good to go."
High temperatures will climb well into the 80s in some areas.
The red flag warning will be in effect until 6 p.m. in the San Gabriel Mountains in Los Angeles and Ventura counties, the forests stretching over those mountains -- Angeles National Forest in LA County and Ventura County's adjacent Los Padres National Forest -- the San Fernando and Santa Clarita valleys, the Santa Monica Mountains, LA County beach cities, metropolitan Los Angeles, downtown LA, the Hollywood Hills and Ventura County's coastal valleys.
In the San Gabriel Mountains and in forest areas, expect winds of 20-35 mph accompanied by gusts of up to 50 mph amid 12 percent humidity levels. In the valleys, the wind is expected to blow at 15 to 25 mph and gust at between 35 and 45 mph, also amid 12 percent humidity.
In the Santa Monicas, winds of between 20 and 30 mph are expected along with gusts of 45-50 mph and 15 percent humidity. And in Los Angeles and beach cities, the wind will blow at 15 to 25 mph and gust at up to 35 mph while the humidity hovers at 18 percent.
If a fire starts in those areas, conditions are favorable for it to spread rapidly through dry brush.
The red flag warning will be in effect until 3 p.m. in Ventura County and the city of Los Angeles. It will expire at 6 p.m. in the mountains, forest and valleys.