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US heat wave: more than 100 million people on alert in 28 states

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Remark

Records crash as temperatures rise amid a high-end heat wave baking the Great Plains. Temperatures have soared to 115 degrees in Texas and Oklahoma, with more than 60 million Americans expected to see triple-digit heat in the coming week.

Heat advisories and extreme heat warnings affect more than 105 million people in 28 states, both in the central United States and in the Northeast, where the combination of warm weather and high humidity will create conditions ripe for heat-related illness or heat stroke .

the weather channel tweeted that more than 200 million people will experience maximums of more than 90 degrees in the next three days.

Dallas, Oklahoma City and Tulsa could all approach 110 degrees in the coming days, and some locations have flown past that. For the first time in history, each of Oklahoma’s network of 120 weather stations reached 103 degrees on Tuesday.

Why this European heat wave is so terrifying

Oklahoma City peaked to 110 degrees for the first time in a decade on Tuesday. That’s only the ninth time since just after World War II that the Sooner State’s capital has been so hot — an event that happens on average once every ten years. It also beats a record that has stood since 1936.

The highest reading came from Mangum in southwest Oklahoma, which hit 115 degrees at 5:55 p.m.

It was similarly warm in North Texas, where Meacham International Airport in Fort Worth climbed to 110 degrees and Dallas to 109. Wichita Falls reached 115, a record high in July.

“Another day of exceptional heat is ahead with three-digit forecasts for all of North and Central Texas,” the National Weather Service in Fort Worth wrote in an online tech discussion.

Dallas is expected to peak around 107 degrees on Wednesday, and it should be in the lower 100s until further notice. Austin and San Antonio also expect similar temperatures.

“We’re in sort of a third wave of temperatures well above average for south-central Texas this summer,” Keith White, a meteorologist with the Weather Service in Austin, said in an interview Wednesday. “Austin could be looking at 106 or 107 today. Last week there were three days in Austin at or above 106.”

Every day between July 9 and July 13 in Austin equaled or broke a record. The city reached a whopping 110 degrees on July 10, reaching 109 on the 11th and 12th. That’s the hottest three-day event ever recorded in the city; accounting goes back to 1897.

“The 110 degrees on the 10th actually equaled our second-warmest temperature on record in Austin history,” White said. So far this season, Austin has logged 39 100-degree days, and San Antonio has increased that to 40.

“That’s the most we’ve ever seen at this point of the season, even more than 2011, the key year for drought and fires,” White said.

Drought and fire have both been problems in much of Texas and Oklahoma, where red flag warnings are in effect. Along and especially west of Interstate 35, humidity levels below 25 percent, coupled with wind gusts up to 50 mph, are conditions ripe for rapid fire spread.

Several fires broke out in north central Texas on Monday, including in Somervell County, southwest of Dallas.

“We’ve had a lot of fires in our area, and even more and bigger ones in other parts of Texas,” White said. He blamed both the recent spate of dry weather and an abnormally wet spring last year. That helped plants to grow and increased the availability of fuels that would later dry up.

“[The wet spring in 2021] let a lot of vegetation grow more than usual, then we had drier winter, spring and summer, which made things more prone to burn,” White said.

Closer to the Gulf Coast, there is slightly more humidity. While that will keep temperatures slightly lower — between 98 and 102 degrees — the juicy air mass in place will help heat indexes above 105 degrees.

“Today will be a sweltering hot one wherever you are in the” [area]The Houston Weather Service wrote.

That humidity drifts north toward the Ozarks and up the Mississippi Valley as well. In Little Rock, Wednesday’s high temperature was predicted to hit just a hair over 100 degrees, but heat indexes could flirt by 115 degrees.

The local Weather Service office described the setup as “Hot, muggy and basically ‘swimming in the sky’ conditions.”

What’s behind the heat? A stationary, high-pressure ridge popularly known as a ‘heat dome’. High pressure results in descending air, which clears the air and promotes abundant sunshine. The high acts like a force field of sorts, redirecting the jet stream north and deflecting any bad weather toward Canada.

While the heat dome appears to be shifting a bit eastward over the next few days, it doesn’t appear to be breaking down anytime soon, meaning there’s no immediate end in sight to the heat. In Oklahoma City, Tulsa, Dallas, Wichita Falls, Houston, Austin and Little Rock, maximum temperatures should remain around or above 100 degrees for the next week.

The heat will also dissipate to the east coast. Heat advisories stretch Wednesday from Delaware through parts of inland New York to southern New Hampshire, where the combination of heat and humidity will feel like 95 to 100 degrees in the north and 100 to 105 degrees in the north. south.

The hottest weather along the east coast is forecast this weekend. On Sunday, the highlights could reach the century line from Washington to New York for the first time in at least several years.

The heat has coincided with a historically extreme event in Europe that has so far killed more than 1,000 people and fueled wildfires that have forced 40,000 people to evacuate. As many as 34 weather stations crossed the 101.7-degree threshold in Britain, bringing temperatures higher than anything Britain has seen before.

Brutal dome of heat moves east, with Central Europe sweltering

Human-induced climate change irrefutably increases the duration and severity of heat waves.


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