Hot temperatures are returning to the Southland, leading the National Weather Service to issue an excessive heat warning Wednesday for portions of Inland Empire that will extend until Friday.

“High pressure aloft will strengthen across Southern California and bring an extended period of hot weather to the deserts for today through Saturday with the heat peaking Thursday and Friday,” the warning said.

Temperatures will be 8 to 12 degrees above normal in the Inland Empire until the weekend due to the strong upper-level ridge, forecasters said. An onshore flow will help keep coastal communities cooler.

Temperatures are expected to pass the 100-degree mark over the next few days in the High Desert, finally tapering off starting Saturday, according to the NWS. Cabazon is forecast to top off at 106 degrees Thursday.

It's heating up for the rest of the week! Here are some heat safety reminders to review. Stay safe! #cawx pic.twitter.com/8LyUZFG1TR — NWS San Diego (@NWSSanDiego) June 20, 2018

Some of the cities under the warning include Victorville, Apple Valley and Banning.

Portions of Los Angeles County will also experience a heat up with valley and desert temperatures reaching the 90s and 100s, forecasters said.

Woodland Hills, San Fernando and Saugus will be in the low to mid-90s until the weekend, and temperatures in areas like Palmdale and Lancaster will exceed 100 degrees.

Sunny skies were forecast in Orange County, along with highs of 70 in San Clemente; 71 in Newport Beach; 74 in Laguna Beach; 81 in Irvine; 82 in Anaheim; and 85 in Fullerton and Mission Viejo.