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- Heat dome to push extreme temperatures across much of US this week</p>
<p>John Bacon, USA TODAY July 21, 2025 at 7:38 PM</p>
<p>A bulge in the jet stream is conspiring with a large high-pressure system to create a "heat dome," bringing temperatures approaching triple digits that could linger into August across a swath of the Midwest and East, forecasters say.</p>
<p>The Kansas City, Missouri, area, which hasn't seen 100 degrees in two years, could reach the figure multiple times this week, AccuWeather Senior Meteorologist Chad Merrill said. Dallas could see 100 degrees for the first time in 2025.</p>
<p>Almost 85 million Americans from South Dakota to Texas and North Carolina to Florida were already under National Weather Service extreme heat warnings, watches or advisories July 21. The heat will intensify July 22 and deep into the week − and possibly beyond.</p>
<p>"By midweek, 90s will have spread from the South into the Midwest and Great Lakes," wrote Jonathan Erdman, a senior meteorologist at weather.com.</p>
<p>Parts of Texas, Arkansas and Louisiana will have highs peak at near or above 100 degrees, and a much larger area of the South, Midwest and Great Lakes will see a heat index surpassing 100 degrees, he said.</p>
<p>"This has the look of a long-lasting heat wave with limited rainfall," Merrill said. "Drought will expand through the central Plains by mid-August and worsen in Kansas and Nebraska, where there are already pockets of moderate to extreme drought."</p>
<p>Angry storms, 'heat dome': Threaten to fuel dangerous weather week</p>
<p>Brief respite for Northeast before heat dome advances</p>
<p>The Northeast will enjoy a few days of lower humidity and cooler temperatures before a "bubble" from the heat dome slips away from the Midwest and brings brutal heat east, AccuWeather forecasts. Temperatures will dip into the 60s in New York and Washington, D.C., the 50s in Boston and into the 40s in some areas of the Northeast's interior.</p>
<p>The respite will wrap up by Friday, when the high temperature for Washington is forecast to reach almost 100 degrees. Detroit will reach deep into the 90s Thursday and Friday. Philadelphia will push close to 100 Friday and Saturday.</p>
<p>"The late-week scorcher heading into the East will be a quick whiplash," AccuWeather Senior Meteorologist Chad Merrill said.</p>
<p>The National Weather Service has issued a heat advisory for all of South Florida including Palm Beach County from noon to 6 p.m. on July 21, 2025.</p>
<p>This article originally appeared on USA TODAY: Heat dome to push extreme temperatures across much of US</p>
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