California temperatures will be rising again starting Aug. 1 when forecasters expect a heat dome to arrive from Texas.
This week’s short break of slightly cooler temperatures will change by Thursday, according to the National Weather Service, which has issued high temperature alerts to residents in the San Francisco and Los Angeles regions.
Temperatures started to climb Wednesday as a high-pressure heat dome from Texas expanded across the western states.
The region should see 1 to 3 degrees warmer temperatures over the next several days and through next week, according to the weather service.
“Plan accordingly for the heat,” the weather service in Los Angeles posted on X Tuesday. “Stay hydrated and limit outdoor activities during the warmest part of the day.”
Thursday’s ultraviolet index in the Los Angeles region, which indicates the intensity of UV radiation from the sun, is expected to reach 9 on a scale of 1 to 10, the National Weather Service reported. A reading of 7 to 9 means that a person could be sunburned within 7 to 8 minutes.
Temperatures in Los Angeles, Ventura, Santa Barbara, and San Bernardino counties, will reach well above normal by the weekend, the weather service forecasted.
The weather service expects high temperatures in the mid-70s to mid-80s along the Los Angeles County coastline, as well as in downtown Los Angeles Thursday.
San Fernando Valley will be significantly hotter, though, with temperatures forecast to reach 97 Thursday and Friday, climbing to 98 over the weekend.
Monsoonal moisture may bring showers and thunderstorms to areas south of Point Conception, in Santa Barbara County, Thursday night into Friday, and over the mountains and Antelope Valley this weekend, according to the statement.
The latest rainfall outlook highlighted a marginal chance of at least 5 percent of precipitation in the southern region of the state would exceed flash flood levels across Los Angeles County and the Mojave Desert.
The heat was also expected to rise in San Diego, inland Southern California, the Coachella Valley and in Northern California this week.
“We are certainly expecting temperatures to go back up in San Diego County,” National Weather Service meteorologist Philip Gonsalves told The Epoch. Times.
A marine layer, however, will hover over the coastal area, protecting some cities from rising temperatures until Saturday. Coastal areas should see temperatures in the 70s, but a mile or two inland they will reach the 80s, he said.
San Diego County valley areas could also reach into the upper 90s and 100s from Friday through Wednesday, the weather service predicted.
Residents in the Inland Empire, a region in central Southern California, could see triple digits, Gonsalves added.
In the Palm Springs and Palm Desert region, the weather service expects temperatures also to begin to climb. Palm Springs could get temperatures around 110 Thursday before rising Friday.
By Saturday, Palm Springs highs could reach 115 to 116 and its highs could then remain at that temperature until Wednesday.
The threat of wildfire will continue with the hot weather, but red-flag warnings have not been issued for the heat wave, according to the weather service in San Diego.
In the San Francisco Bay Area, weather forecasters also expected moderate heat in the North, East, South Bay, and interior Monterey and San Benito counties.
The National Weather Service reported the Bay Area could see temperatures 5 to 10 degrees above seasonal averages, depending on the city.
Coastal areas were expected to get some relief with a marine layer throughout the heat wave, however, according to the weather service.
“Coastal areas will hold on to the marine layer through the event, so temps here will stay at or slightly below normal,” the weather service said.
It also reported a 5 percent chance of dry lightning around the Bay Area and along the Santa Cruz and Monterey coast.
