Californians should expect temperatures to heat up again after July 21 as forecasters say another heat wave is headed to the state.

The National Weather Service issued a heat advisory for the Los Angeles, Ventura, and Santa Barbara region Friday as thermometers started rising.

The Santa Monica Mountains, other mountain areas in the region, and Antelope Valley were expected to be the hottest with temperatures reaching eight to 10 degrees above normal, according to Mike Wofford, a meteorologist at the National Weather Service’s Oxnard office.

“Those are the areas particularly being impacted by the heat,” Mr. Wofford told The Epoch Times.

The weather service expects valleys and coastal cities to be about four to eight degrees above normal for this time of year, he added.

The sea breeze along the coast is helping to keep some temperatures down, however.

“We’ve got our traditional low clouds and fog sitting right off the coast,” Mr. Wofford said. “It’s keeping that layer of cooler air and just helping to moderate the temperature a little bit.”

Temperatures should stay slightly elevated, reaching to 90 degrees and 105 degrees in the desert areas into Wednesday, and then cool off near the end of next week, he said.

Further north in the San Francisco Bay Area, the National Weather Service also issued heat and coastal flood advisories Friday.

Temperatures were expected to reach the low 90s up to 105 in some cities through Friday night.

Although the heat wave won’t be as long or as hot as last week’s, high temperatures in the Bay Area impacts many who don’t have air conditioning, according to National Weather Service Meteorologist Brayden Murdock, in San Francisco.

“It’s just harder around the Bay Area to escape the heat when we do start to get that heat,” Mr. Murdock told The Epoch Times. “Luckily, the heat advisory expires tonight, then we kind of see a lull over the weekend before it starts to heat up next week.”

Starting Monday, the weather service expects temperatures to start rising again before cooling down Thursday and Friday.

A coastal flood advisory was also issued for the Bay Area through Monday night.

Minor coastal flooding is expected on the bayside shorelines of San Francisco Bay and San Pablo Bay. Residents should expect some flooding of low-lying areas, including lots, parks, and roads, with possible isolated road closures, according to the advisory.

The high tide this weekend could reach 6.7 feet, which is just over the usual 6-foot peak.

A combination of an alignment with the sun, moon, and Earth is causing the somewhat rare phenomenon.

“It’s a little rare for us to see this kind of peak in the summer, compared to the winter’s King Tides,” Mr. Murdock said.