Forecasters say Southern California is in for another day of summerlike heat, but for the time being the morning rush is being hampered by dense fog in coastal areas.
The National Weather Service says a shallow marine inversion is in place Thursday morning beneath strong high pressure aloft.
Meteorologists warn of visibilities of a quarter-mile or less from San Luis Obispo County south to San Diego.
On Wednesday, the late-winter heat wave set records across the region, including 94 degrees in the Woodland Hills area of Los Angeles and in Riverside, and 93 at Bob Hope Airport in Burbank. Downtown Los Angeles was 85, 15 degrees above normal for the date.