105-Degree Temps Forecast For Parts Of SoCal Bringing Health And Fire Risks

LOS ANGELES, CA — Summer weather is set to make a bold entrance in Southern California this weekend with dangerously hot temperatures — expected to exceed 105 degrees in some parts of the region — prompting the National Weather Service to issue heat advisories for much of SoCal.

A lingering marine layer along the coast and in the valleys will keep things cooler Thursday before temperatures begin trending upwards into the weekend. Heat advisories kick in for much of the region Saturday at 10 a.m. Temperatures are expected to peak Saturday with advisories in some areas lasting until Sunday night.

On Saturday, temperatures will exceed 104 in the Inland Empire; 101 in the inland valleys of San Diego County; the 90s in inland Orange County and exceed 100 degrees in the Santa Clarita, San Fernando and San Gabriel valleys, according to the weather service.

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The forecast high for Saturday is 83 in Downtown Los Angeles, 94 in Temecula, 85 in Irvine, 73 in Laguna Beach, 71 in Santa Monica and 109 in Palm Desert.

Warm and windy conditions are expected Sat through Tue, with 100+ degree highs over interior areas. There is a risk of heat-related illnesses, and an increased threat of grassfires. Report any wildfires to authorities and avoid creating sparks. #firewx #cawx pic.twitter.com/ZDhNR6UyTq
— NWS Los Angeles (@NWSLosAngeles) June 20, 2024

A moist weather system will bring a slight chance of showers and thunderstorms across the region, though mostly in the San Diego, Riverside and San Bernardino county mountains and deserts on Saturday afternoon and into Sunday. The marine layer is set to return Saturday night into Sunday, making the coasts dramatically cooler than inland areas, where temperatures are expected to remain well above average, though slightly cooler than Saturday in most areas.

Hot temperatures are expected to continue for the first half of next week in inland areas, with the marine layer continuing to keep things cooler along the coast, the NWS said.

The heat advisories come as the official start of summer began at 1:50 p.m. Thursday with the summer solstice — the longest day of the year.

Highs Thursday were expected to hit the low 70s along the coast, the 80s inland, the mid-80s to high-90s in the Inland Empire and mountains and the mid-100s in the desert.

☀️☀️IT'S THE SUMMER SOLSTICE!! ☀️☀️ The longest day of the year and the official start of summer! The solstice officially occurs at 1:50 pm PDT. The weather will feel quite summer like inland today, but our dear friend marine layer will keep the coastal areas cool 😎 pic.twitter.com/mEKLn0oN2B
— NWS San Diego (@NWSSanDiego) June 20, 2024

The National Weather Service warned that the high temperatures bring a risk of heat-related illnesses as well as an increased risk of wildfire.

To stave off the heat, people are urged to drink plenty of water, stay in air-conditioned rooms, limit sun exposure and check up on relatives and neighbors.

SoCal saw a number of fires break out over the weekend, including near the Hollywood Bowl and Moreno Valley. The massive Post Fire in northeast LA County continues to burn: It hit 47 percent containment Thursday as its size increased to 15,690 acres.

Cooling centers will be open across Southern California. More information about where to find them is available on the state's website.