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Hot time ahead: 108-109 degrees Thursday, Friday
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The California Department of Public Health advises everyone to drink plenty of water during hot days, especially those working in the heat. - photo by Journal file photo

Temperatures are anticipated to climb 20 degrees by Thursday from today’s expected high of 89 degrees as the South County is expected to swelter Thursday with the highest temperature of the year — 109 degrees.

There won’t be much relief on Friday as the National Weather Service is forecasting a high of 108 degrees on Friday.

It is part of early season heat wave created by high pressure over Arizona and Nevada that is expanding westward.

While Thursday is the hottest day for Manteca, the National Weather Service is warning Friday will be the riskiest day this week as they issued a relatively rare “very high” heat risk warning. That is because the overnight lows are not expected to slip below 67 degrees as the cooling Delta breezes are expected to be virtually non-existent.

Highs in the valley will range from 106 to 110 degrees on Thursday, 104 to 112 degrees on Friday, and 96 to 109 degrees on Saturday. The foothills won’t be much cooler with the highs expected to range from 101 to 106 degrees Thursday and Friday.

Thursday in Yosemite Valley, as an example, will be 98 degrees with the overnight low matching Manteca’s 67 degrees.

Marine layers will protect San Francisco as it lives up to Mark Twain’s observation that “the coldest winter I ever spent was a summer in San Francisco.” The high in The City on Thursday will be 72 degrees — just five degrees higher than Manteca’s low on a day in the Family City where the temperature is expected to climb to 109 degrees. The low in San Francisco Thursday is expected to be 55 degrees.

On the flip side, Death Valley is expected to live up to its reputation Thursday with a high of 124 degrees and an overnight low of 95 degrees.

Interior valleys and mountains of the east and north San Francisco Bay region will also see rising temperatures but onshore flow near the coast should limit heat risks.

The weather service is advising people between noon Thursday and 9 p.m. Saturday to:

*Drink extra water.

*Avoid strenuous outdoor activities from 10 a.m. and 6 p.m.

*Help elderly. kids, and pets stay cool.

*Plan to be in air conditioned buildings.

Manteca’s first triple digit day of the year came on May 31, Memorial Day, when the temperature reached 100 degrees.

Manteca’s homeless emergency center at 555 Industrial Park Drive will double as the city’s cooling center. It is open seven days a week, 24 hours a day.

 

To contact Dennis Wyatt, email dwyatt@mantecabulletin.com