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Californians are at a high risk of losing power as the state's grid operator calls for the tenth day in a row to conserve energy on Friday with demand to continue to strain the grid.

Friday's alert will last from 4 to 9 p.m., according to the California Independent Operator.

Cal ISO declared an "Energy Emergency Alert 2" for Thursday. That was a couple of steps above a Flex Alert, and residents were strongly urged to cut back on energy use amid hot temperatures. The next step is an "Energy Emergency Alert 3," which means energy demand is outpacing supply. When it reaches that point, the grid operator could order rotating outages at any time.

The previous Flex Alerts have been issued to avoid power disruptions due to the increased strain on the power grid as more people are using electricity to keep cool amid record-breaking heat.

Last week, Gov. Gavin Newsom signed an executive order intended to temporarily increase the state's energy supply.

So far this week, there have not been any planned outages reported in relation to excessive use of energy. However, thousands of people went without power on Tuesday when temperatures hit record-breaking numbers. In 2020, multiple factors including high temperatures and an Oregon wildfire, led to several days of rolling blackouts for millions of Californians.

| Video Below | 'Significantly stressed': Cal ISO says demand for power is as high as summer of 2017, expects it to increase

How long will the heat last?

The heat is expected to continue through Friday.

KCRA 3’s weather team is calling Friday a heat impact day with highs forecast to be 109 in the Valley. That means people should plan around the heat in the afternoons, especially students with after-school activities.

(Click through below for the 7-day forecast, more.)

Smoke from the Mosquito Fire burning in Placer and El Dorado counties will continue to impact areas across the Sacramento region on Friday and Saturday, according to Spare the Air.

The Sacramento Metropolitan, El Dorado, Feather River, Placer and Yolo-Solano air districts forecast unhealthy air quality for the region over the next two days.

In the event of rotating outages, the utility released a search map that allows customers to search and see if their home would be impacted. Click here to search by address.

The Sacramento Municipal Utility District is also preparing for possible outages. Click here to search by address.

You can also track outages across California with this map below that uses data from the California Office of Emergency Services. App users, click here.

Miscommunication led utilities to mistakenly cut power to customers in several California cities during unprecedented demand on energy supplies, operators of the state’s electricity grid acknowledged Wednesday while warning the continuing extreme heat could prompt much larger rolling outages.

Confusion occurred Tuesday afternoon between several Northern California utilities and the California Independent System Operator as the grid was perilously close to running out of energy amid record-breaking temperatures, said Elliot Mainzer, president and CEO of Cal-ISO.

"That is certainly concerning to me," Mainzer said, adding that he was looking into what happened and how many customers were affected. “There was a lot happening on the grid for everybody last night. And so we’ll double down on the communication to make sure that doesn’t happen again.”

With record demand on power supplies across the West, California snapped its record energy use around 5 p.m. with 52,061 megawatts, far above the previous high of 50,270 megawatts set July 24, 2006.

| Video Below | CA ISO gives update on power grid after Tuesday's record-breaking heat

Cooling centers across Northern California are open to allow some residents to get a break from the forecasted week of triple-digit heat.

| Read More | Here are the cooling centers opening Thursday amid forecast triple digits in NorCal

| MORE LIKE THIS | California heat wave: What to know about heat cramps, heat exhaustion and heatstroke

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