Record temperatures are expected across California by Sunday from Manteca and Yosemite Valley to Death Valley as the third heat wave of 2021 slams much of the Golden State.

Manteca-Ripon-Lathrop may see a record high of 111 degrees Sunday with the overnight low of 74 degrees. If that occurs Manteca’s low will match San Francisco’s forecasted high for Sunday. The low in The City is expected to drop to 60 degrees Sunday.

The hottest spot in California — and likely the planet — on Sunday will be Furnace Creek in the heart of Death Valley. The National Weather Service is expecting 130 degrees.

If that should happen, Death Valley will come within four degrees of the record world air temperature of 134 degrees. That mark for recorded temperatures was set in 1913 in Death Valley.

The four day heat event that starts in earnest today is more brutal than the one in June that pushed the Manteca high to 107 degrees and the top reading in Death Valley to 128 degrees.

Yosemite Valley will be seven degrees cooler than Manteca on Sunday when the high there hits 101 degrees.

The place not to be to if you want to stay cool is Sonora. It is now expected to reach 116 degrees Sunday sandwiched between 114 degree days on Saturday and Monday.

The coolest place in California on Sunday will have a high of 40 degree and a low of 27 degrees. But to get there you will have to hike for 11 miles out of Whitney Portal at an elevation of 8,374 feet west of Lone Pine to the 14,505-foot summit of Mt. Whitney.

The National Weather Service has an excessive heat warning in effect Friday to Monday evening for Valley, foothills, and mountains up to 6,000 foot elevation.

In the warning issued Thursday, the weather service noted another round of dangerous and excessively hot conditions will return to the region as strengthening high pressure builds overhead.

Widespread triple digit heat will become common throughout the Central Valley today with subsequent day-to-day warming through the weekend. The hottest days are forecast to be on Saturday and Sunday where communities up and down the Valley will approach and possibly exceed 110 degrees.

Some locations in the central and northern Sacramento Valley will approach 115 degrees. This combined with the very warm overnight lows in the upper 60s to low 80s will result in widespread high to very high heat risk, and will bring increased chances for heat-related illness. Temperatures will begin to cool next week with some minor relief possible for areas around Delta as early as Monday.

To contact Dennis Wyatt, email dwyatt@mantecabulletin.com