(Shutterstock)

(Shutterstock)

Cal ISO declares statewide power emergency

Transmission line and power plant went offline unexpectedly

The California Independent System Operator declared a statewide Stage 2 emergency shortly before 6 p.m. Sunday, which means power outages are likely, because of excessive heat driving up electricity demand and use and putting strain on the regional power grid.

The nonprofit California ISO oversees the operation of California’s bulk electric power system and transmission lines. The California ISO called the emergency after a transmission line carrying power from Oregon to California, and another in-state power plant, went offline unexpectedly. The cause of these outages is unknown as of late Sunday afternoon.

The emergency declaration allows the ISO to use reserve power and to tap into emergency assistance from neighboring balancing authorities. During this Stage 2 emergency, if system conditions do not improve, the ISO may declare a Stage 3 emergency, which will lead to rotating power outages.

Consumer conservation was credited with helping to avoid power outages on Saturday. But extreme heat coupled with wildfires are contributing to increased energy demand and reduced supplies on Sunday, the ISO said.

Grid operators are predicting a shortfall of as much as 4,000 megawatts from the electric power supply late Sunday afternoon into the night.

Fires took out 1,600 MW of transmission resources on Saturday; about 500 MW of that loss was returned to service Sunday. But later Sunday, power plant outages due to the heat reduced supplies by another 625 MW.

Based on the current forecast and without significant conservation efforts, rotating power outages are likely throughout the state until at least 9 p.m. Sunday.

The ISO also has called a “flex alert,” a call to consumers to voluntarily conserve electricity, until 9 p.m. Sunday and from 3 to 9 p.m. Monday. Recommended conservation steps include setting air conditioner thermostats to 78 degrees or higher, turning off unnecessary lights and deferring use of major appliances.

Bay Area NewsCaliforniasan francisco news

If you find our journalism valuable and relevant, please consider joining our Examiner membership program.
Find out more at www.sfexaminer.com/join/

Just Posted

Giants second baseman Donovan Solano scores on a double in the seventh inning against the Dodgers at Oracle Park on July 29. (Chris Victorio/Special to The Examiner)
Will the Giants make the playoffs? Kris Bryant may be the answer

By Chris Haft Special to The Examiner You’d be hard-pressed to find… Continue reading

Tiffany Carter, owner of Boug Cali West Coast Creole Shack in San Francisco’s La Cocina Marketplace, was dismayed by gentrification she found when she returned to her hometown to start a business. (Kevin N. Hume/The Examiner)
SF Black Wallstreet: Helping residents build wealth, reclaim spaces they’ve had to leave

Tiffany Carter moved back to her hometown of San Francisco five years… Continue reading

A prescribed fire at Sequoia and Kings Canyon National Parks was conducted in June 2016 to reduce hazardous fuel loading, increase watershed health, and restore the natural fire cycle in the Redwood Canyon area ecosystem. (Photo courtesy Rebecca Paterson/National Park Service)
Experts, UC scientists discuss wildfires in the state’s riskiest regions

Wildfires are nothing new in California’s history, but the magnitude and frequencies… Continue reading

Fourth-grade students at Lucerne Valley Elementary School don masks and Western wear for a “Walk Through California” history day during in-person instruction. (Courtesy of Krystal Nelson)
Confusion over mask mandate for California schools sparks tension between districts and parents

By Diana Lambert EdSource Shifting rules around mask mandates at schools are… Continue reading

In his extensive filming of The City during the pandemic, Eric Goodfield said he has been “observing how the environment affects the behavior of people.” (Kevin N. Hume/The Examiner)
Filmmaker Eric Goodfield fixes lens on SF’s COVID days

140 days of shooting in The City made for ‘greatest adventure’

Most Read