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More than 150 million Americans are under extreme heat advisories as temperatures soar

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More than 150 million Americans from Texas to Maine are under extreme heat advisories as dangerously high temperatures bake the nation.

In more than three dozen states from the Plains to New England , daytime temperatures could reach and exceed 100 degrees Fahrenheit ( 38 degrees Celsius) through at least Tuesday .

The National Weather Service said “extremely dangerous” temperatures should expand from the Midwest into the Mid-Atlantic and break “numerous” records.

This early summer heatwave isn’t necessarily a sign that we’re in for a hotter-than-average summer, Douty said. Climate models, however, suggest that we are. The NWS Climate Prediction Center’s seasonal outlook for July , August , and September 2025 predicts above-average temperatures for the majority of the U.S. As global temperatures continue to rise, so will the frequency and intensity of extreme heat events..