About a dozen deaths in Washington and Oregon may be tied to an intense heat wave that brought scorching temperatures to the Northwest and caused one power utility to impose rolling blackouts amid heavy demand.

The dangerous weather that gave Seattle and Portland consecutive days of record high temperatures exceeding 100 degrees Fahrenheit (37.7 degrees Celsius) eased in those cities on Tuesday. But inland Spokane, towns in eastern Oregon and cities in Idaho saw temperatures spike.

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The National Weather Service said the mercury reached 109 F (42.2 C) in Tuesday in Spokane — the highest temperature ever recorded there.

About 9,300 Avista Utilities customers in Spokane lost power on Monday and the company said more planned blackouts began on Tuesday afternoon in the city of about 220,000 people.

“We try to limit outages to one hour per customer,” said Heather Rosentrater, an Avista vice president for energy delivery.

She said about 2,400 customers were without power as of shortly after 2 p.m. Tuesday, mostly on the north side of the city, and those customers had been alerted about the planned outage. About 21,000 customers were warned Tuesday morning that they might experience an outage, she said.

Rosentrater said the outages were a distribution problem and did not stem from a lack of electricity in the system.

Meanwhile, authorities said multiple recent deaths in the region were possibly related to the scorching weather.

The King County Medical Examiner’s office said two people died due to hyperthermia, meaning their bodies had become dangerously overheated. The Seattle Times reported they were a 65-year-old Seattle woman and a 68-year-old Enumclaw, Washington, woman.

And the Snohomish County Medical Examiner’s Office on Tuesday told the Daily Herald in Everett, Washington, that three men — ages 51, 75, and 77 — died after experiencing heat stroke in their homes. They were from Everett, Granite Falls, and Marysville in Washington.

The heat may have claimed the life of a worker on a nursery in Oregon, the state’s worker safety agency, known as Oregon OSHA, said on Tuesday.

The man, whose name was not disclosed, died at Ernst Nursery and Farms, a wholesale supplier in St. Paul, 20 miles (32 kilometers) north of Salem, on Saturday amid sweltering temperatures. An Oregon OSHA database listed the death as heat-related.

“The employee was working on a crew moving irrigation lines. At the end of the shift he was found unresponsive in the field,” said agency spokesman Aaron Corvin.

President Joe Biden, during an infrastructure speech in Wisconsin, took note of the Northwest as he spoke about the need to be prepared for extreme weather.

“Anybody ever believes you’d turn on the news and see it’s 116 degrees in Portland, Oregon? 116 degrees,” the president said, working in a dig at those who cast doubt on the reality of climate change. “But don’t worry — there is no global warming because it’s just a figment of our imaginations.”