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Dangerous Heat Dome Spreads From West to East Across Middle of U.S.

Forecasters warned of 105 to 115 degree highs, broken records and higher wildfire risk as hazardous heat lingered into next week.

  • On Sunday, severe weather alerts covered roughly 40 million people across the United States as a massive heat dome scorching the West reached its peak.
  • Forecasters labeled the prolonged warmth "exceptionally rare," noting the heat dome built last week and baked the West before expanding into the Plains and Rockies.
  • Heat brought highs of 106 in Salt Lake City, 107 in Bismarck, and 110 in Billings, while the National Weather Service warned conditions in Bismarck remain "dangerously hot" through Monday.
  • The National Weather Service advised residents to "stay out of the sun" and "check up on relatives and neighbors," warning that extreme conditions could strain "health systems, industries, and infrastructure."
  • AccuWeather Vice President of Forecast Operations Dan DePodwin said temperatures will peak in the mid- to upper 90s in Interstate cities of the Atlantic and New England this week as heat shifts toward the Midwest and East.
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Nevada Globe broke the news on Saturday, July 11, 2026.
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