Extreme heat expected this weekend, all-time records threatened

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Almost the entire state of California will be affected by this heat wave, in addition to the major metropolitan areas of the Southwest. Many daily temperature records will be broken and some all-time records could also be threatened.

“High pressures will continue to dominate the southern Great Basin and the Mojave Desert, producing a major heat wave until early next week,” the National Weather Service (NWS) office in Las Vegas said. “All-time record temperatures will be rivaled or surpassed in some areas.”

While the southwest may be known for its warm temperatures, those numbers are extreme.

A “very high” heat risk, the highest level (4 of 4), was issued for much of California, Nevada, Arizona and Utah. This includes cities such as Sacramento, Bakersfield, and Palm Springs, California; Las Vegas and Phoenix.

“Very high” simply means that the entire population, and not just the elderly or sick, will be at a high risk of heat-related illness due to the long duration of the heat and the lack of relief during the heat. night.

The current state temperature record for Utah is 117 degrees. The city of St. George could meet or exceed that record on Saturday.

Las Vegas recorded a high of 117 degrees on Saturday afternoon. This corresponds to the highest temperature of all time set on July 24, 1942. This peak was reached on three other occasions: July 19, 2005, June 30, 2013 and June 20, 2017.

The National Weather Service is forecasting at least that temperature for Sunday.

Sacramento also has the chance to surpass its record temperature of 114 degrees this weekend.

Death Valley, California, peaked at 130 degrees on Friday, approaching the hottest temperature on record on the globe – 134 degrees at the same location in 1913.
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Low temperatures in Las Vegas on Saturday and Sunday mornings are expected to be 94 and 93 degrees, respectively. In Phoenix, low temperatures are unlikely to drop below 91 degrees.

This is a problem because these temperatures do not allow the body to cool down successfully at night. The temperature must drop to at least 80 degrees for recovery to begin. In fact, a person can lose up to 2 liters of fluid overnight due to sweating if the temperature does not drop below 85 degrees.

Heat affecting the electricity network

The California Independent System Operator (ISO) on Thursday said in a press release that “extreme temperatures across much of California” could result in a “potential lack of capacity on the state’s power grid.”

Residents were asked to voluntarily conserve electricity between 4 p.m. and 9 p.m. Friday to “ease the strain on the grid during crucial evening hours when solar power is reduced or is no longer available.”

The concern is that since the extreme heat is expected to continue throughout the weekend, this demand will exceed supply. The California ISO has warned that if this happens, rotating power outages will be implemented.

It comes after record heat in June.

Eight states recorded their hottest June on record: Arizona, California, Idaho, Massachusetts, Nevada, New Hampshire, Rhode Island and Utah.

Last month was the hottest June on record for the lower 48 states

Just over 15% of the United States saw all-time highs last month, the highest on record by NOAA.

All-time records were set in the Northwest on June 27-28, including state records in Washington and Oregon. Scientists reported this week that the heat wave in late June in the Pacific Northwest would have been “virtually impossible” without the effect of man-made climate change.

With even more all-time records potentially broken this weekend, the concern is whether the power grid will be able to meet demand.

CNN meteorologists Jennifer Gray, Robert Shackelford and Hannah Gard contributed to this report.



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