Scorching Weekend Temperatures Expected Across Orange County

ORANGE COUNTY, CA — Temperatures in Orange County are expected to remain heated over the weekend, the National Weather Service reported.

According to the service, inland cities such as Mission Viejo, Lake Forest and Rancho Santa Margarita will be subjected to temperatures upwards of 94 degrees on Saturday.

Sunday, inland Orange County residents will see little relief from the heat.

In Orange County coastal towns such as Seal Beach, Newport Beach and Dana Point, residents can expect slightly cooler temperatures ranging from the low-to-mid '80s with temperatures lowest near the county's shorelines, according to NWS.

A large swath of Los Angeles County remains under an excessive heat warning as temperature spike amid the ongoing heatwave. Parts of the San Fernando Valley are expected to reach 109 degrees Saturday, according to the National Weather Service.

High temperatures from the coasts to the valleys are likely to vary by as much as 30-plus degrees as the marine layer protects the coast from the worst of the heat.

The warmer-than-usual conditions have been cooking the region for more than a week and will persist into next week when temperatures won't inch down until midweek, forecasters said.

"An area of high pressure aloft will keep temperatures warmer than normal through next week," according to the National Weather Service. "High pressure aloft will strengthen today (Friday) and bring dangerously hot weather to portions of the area through Sunday. The coastal areas will remain cooler and the warming trend will be moderated due to a persistent and shallow marine intrusion."

The excessive heat warning will be in effect through 8 p.m. Sunday in the Santa Clarita and Antelope valleys, along with the western San Fernando Valley and the 5 and 14 Freeway corridors.

Forecasters said "dangerously hot conditions" will be possible, with temperatures up to 110 possible, and little relief during overnight hours.