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California Braces for 109-Degree Heat That Will Test Power Grid

Economy Aug 15, 2022 11:30
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2/2 © Bloomberg. Power lines and transmission towers near the Ivanpah Solar Electric Generating System in the Mojave Desert in San Bernardino County, California, U.S., on Saturday, Feb. 19. 2022. California aims to end greenhouse gas emissions from its electricity grid by 2045. Photographer: Bing Guan/Bloomberg 2/2

(Bloomberg) -- California and parts of the Pacific Northwest will wilt under near-record heat this week as a high-pressure dome builds across the region, taxing power supplies as residents crank air conditioners.

An excessive-heat watch stretches the length of California’s Central Valley where temperatures could reach 109 degrees Fahrenheit (43 Celsius) as soon as Tuesday, the National Weather Service said. A second pocket of extreme warmth is forecast for western Washington. 

In a nod to the expected strain on electricity supplies, California’s grid operator is asking power generators and transmission providers to hold off on any planned maintenance projects through Thursday from noon to 10 p.m. local time each day.

The torrid temperatures also will stress one of North America’s key agricultural basins, which already is grappling with the worst drought in centuries. The Central Valley’s orchards, farms and vineyards are major sources of everything from almonds and tomatoes to cotton and grapes.

By Wednesday, Sacramento could hit 105, just shy of a record for the date, and Redding could touch 109, which would tie the high for Aug. 17, said Bob Oravec, a senior branch forecaster with the US Weather Prediction Center. 

“It is going to be well above average,” Oravec said. “The heat will also eventually spread to the Northwest and Northern Plains.” 

Power demand is expected to peak Monday at almost 43.8 gigawatts and climb even higher over the next two days to about 45.2 gigawatts by mid-week, according to grid operator California Independent System Operator.  

On-peak power prices at Southern California’s SP15 hub jumped 29% to average $149.70 a megawatt for Monday, the most since Sept. 8, 2021. That day saw the highest demand of the year at nearly 44 gigawatts. The all-time high of more than 50 gigawatts was set in 2006.

One gigawatt is enough to power 750,000 homes in the state. 

While the heat presses down on California, the annual monsoon that has caused flooding in Las Vegas and across the Southwest is expected to continue all week, Oravec said. 

A patch of tropical moisture sweeping across Texas out of the Gulf of Mexico could add more energy to the storms, which have killed at least two people and flooded the Las Vegas Strip, according to USA Today. 

 

©2022 Bloomberg L.P.

California Braces for 109-Degree Heat That Will Test Power Grid
 

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