Oregon
Extreme, long-lasting heat dome to spike Oregon temps near 110: ‘This will be remembered’
An extreme and long-lasting heat dome is forecast to hit Oregon late this week, spiking temperatures as high as 110 degrees and potentially lasting a week or more.
The blistering temperatures could impact Oregon’s electrical grid, increase wildfire danger and make urban centers deadly for the elderly and those without air conditioning, officials said.
The heat is forecast to begin Thursday night — the Fourth of July — and peak Friday and Saturday. In the Willamette Valley, there’s a 15-20% chance of temperatures reaching 110 degrees Saturday and a good chance of three days above 100 degrees.
In Medford, there’s a 30-40% chance of temperatures reaching 115 degrees and five days forecast above 100 degrees.
“I think this is an event that will be remembered,” National Weather Service meteorologist Shawn Weagle said. “This has the potential to be a high impact event.”
The heat isn’t expected to reach the levels of the 2021 heat dome that shattered state records with temperatures of 117 to 118. However, this event is expected to last longer, with a second heat wave possible next week.
“There just isn’t much of a break,” Weagle said.
Deadly heat across Western Oregon
The most concerning time period is Friday, Saturday and Sunday, when temperatures are forecast to reach 98 to 105 across wide swaths of the Willamette Valley. Nighttime temperatures may only drop as low as the 70s.
The farther south you go, the hotter it gets. Medford’s forecast is a blistering string of high temperatures — 104 on Thursday, 110 on Friday, 111 on Saturday, 108 on Sunday and 104 on Monday.
“We’re most concerned about people without access to air conditioning and in apartments,” Weagle said. “The fatalities we saw in 2021 were people without access to cooling.”
In the 2021 heat dome, 123 people died in Oregon because of the heat wave, according to the Center for Health Statistics.
How long will the heat wave in Oregon last?
The first heat wave lasts from Thursday night to Sunday evening, Weagle said, before it breaks somewhat by Monday and Tuesday.
Problem is, “the climate prediction center is putting a moderate risk that the heat lasts into a second week,” he said. “If that happens, we could see a brief cool down before it heats back up for a prolonged period.”
The concern is two weeks of temperatures above 90 with multiple hits above 100 degrees, Weagle said.
“The longer these (heat waves) last the harder they are on people,” he said.
Escape from the heat on the Oregon Coast
The best place to escape the heat, as ever, will be the Oregon Coast, where temperatures are forecast to stay in the 70s, with Tillamook and Astoria reaching the 80s.
“They’re still forecast to get that onshore flow from the ocean, which will cool things down” Weagle said.
Wildfire danger likely to increase in Oregon
Wildfire season has stayed quiet in western Oregon so far this season, with cooler and somewhat wetter conditions than normal. Central Oregon has been more active.
However, a long-stretch of such hot and dry weather could dry out fuels rapidly and increase wildfire danger quickly, leading to a longer summer stretch at high wildfire risk.
What is a heat dome?
As for what’s forecast to cause the heat dome, it’s “a very strong ridge of high pressure that pushes the air down and heats it up,” Weagle said. “Combined with the strong sunshine this time of year and the hot air mass from the southwest, all those factors come together in this heat dome.”
Zach Urness has been an outdoors reporter in Oregon for 16 years and is host of the Explore Oregon Podcast. Urness is the author of “Best Hikes with Kids: Oregon” and “Hiking Southern Oregon.” He can be reached at zurness@StatesmanJournal.com or (503) 399-6801. Find him on X at @ZachsORoutdoors.
Three Oregon lawmakers say they plan to introduce a bill that would bar utilities from raising rates if they have unresolved wildfire lawsuits for three or more years, describing it as an effort to hold PacifiCorp accountable as the utility faces a series of lawsuits stemming from the deadly 2020 wildfires that ravaged the state.
Republican state Reps. Jami Cate, Virgle Osborne and Ed Diehl announced their proposal in a statement Monday, on the heels of an approved rate increase for PacifiCorp customers and a federal lawsuit against the electric power company.
The federal government sued PacifiCorp last week over the Archie Creek Fire, which ignited in Oregon’s Douglas County in September 2020 and burned more than 200 square miles, about half of which was federal land. The complaint accuses the company of negligence for failing to maintain its power lines to prevent wildfires. In its filing, the government says it brought the suit to recover “substantial costs and damages.”
A PacifiCorp spokesperson said in an emailed statement Monday that the company was working with the U.S. government to resolve the claims.
“It is unfortunate the U.S. government decided to file a lawsuit in federal district court, however PacifiCorp will continue to work with the U.S. government to find reasonable resolution of this matter,” the statement said.
The federal lawsuit was filed on the same day the Oregon Public Utility Commission approved a 9.8% rate increase for PacifiCorp’s residential customers next year. In its rate case filings, the company said its request to increase rates was partly due to higher costs stemming from wildfire risk and activity.
When the new rate takes effect in January, PacifiCorp rates will have increased nearly 50% since 2021, according to the Oregon Citizens’ Utility Board, which advocates on behalf of utility customers.
The three lawmakers said they will introduce their bill in the upcoming legislative session, which starts in January.
“The federal government is doing the right thing by filing this lawsuit, and we stand firmly behind it,” Osborne, who is set to be the future bill’s co-chief sponsor, said in a statement. “PacifiCorp needs to pay up and take responsibility for the destruction they’ve caused, and putting a stop to rate hikes is the best way to achieve it.”
PacifiCorp is poised to be on the hook for billions in damages in the series of lawsuits over Oregon’s 2020 fires.
The company has already reached two settlement agreements over the Archie Creek Fire, including one for $299 million with 463 plaintiffs impacted by the blaze and another for $250 million with 10 companies with commercial timber interests, according to its website.
In other litigation, an Oregon jury in June 2023 found it liable for negligently failing to cut power to its 600,000 customers despite warnings from top fire officials and determined it should have to pay punitive and other damages — a decision that applied to a class including the owners of up to 2,500 properties. Since then, other Oregon juries have ordered the company to pay tens of millions to other wildfire victims.
The wildfires that erupted across Oregon over Labor Day weekend in 2020 were among the worst natural disasters in state history, killing nine people and destroying thousands of homes.
— The Associated Press
On Wednesday at 2:18 a.m. the National Weather Service issued a wind advisory valid from 10 p.m. until Thursday 10 a.m. for North Central Oregon and Central Oregon.
The weather service states, “South winds 10 to 20 mph with gusts up to 45 mph expected.”
“Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result,” adds the weather service. “Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.”
Advance Local Weather Alerts is a service provided by United Robots, which uses machine learning to compile the latest data from the National Weather Service.
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