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40 million under alerts as heat dome peaks across western U.S.

40 million under alerts as heat dome peaks across western U.S.

Summary

About 40 million people in the western U.S. are under severe heat warnings due to a heat dome, which traps hot air over an area. Temperatures are expected to reach 105 to 115 degrees, causing health risks and increasing wildfire danger across several states.

Key Facts

  • A heat dome is causing extremely high temperatures across the western United States.
  • Around 40 million people are under heat alerts in states like Montana, Utah, North Dakota, and South Dakota.
  • Temperatures could climb as high as 112 degrees in Billings, Montana, and up to 107 degrees in Salt Lake City, Utah.
  • The heat wave is unusually long and intense, with limited cooler relief expected.
  • High temperatures increase the risk of heat-related illnesses such as heat stroke.
  • Wildfire risk is growing due to the hot and dry conditions.
  • The heat dome’s impact is spreading eastward while staying strong in the northern Plains and Southwest deserts.
  • Officials warn that health systems and infrastructure may be strained by the extreme heat.
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