The National Weather Service has issued a dense fog alert for communities along the coast, from San Diego to Malibu.
Areas of dense fog continue along the immediate coast to about 5 miles inland through midmorning, likely impacting coastal airports, including John Wayne Airport, at times through the morning.
Fog should dissipate by 9 a.m., experts said.
Along Orange County and San Diego County coastal areas, visibility may shrink to one-quarter mile or less at times, creating hazardous travel conditions along parts of Interstates 405, 5, 8 and 805 and highways 1, 39, 55, 73 and 163, according to the alert.
The thick, low clouds may return this evening into Saturday morning along portions the Orange and San Diego counties’ coasts, the National Weather Service said.
Motorists are warned to slow down, use low beam headlights and leave plenty of distance between them and the car in front.