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Record-High Temperatures Set in over a Dozen States as Heat Wave Moves East

  • A massive heat dome is causing record-breaking temperatures across 14 U.S. states, with the National Weather Service reporting it is creeping eastward across the continental United States.
  • Meteorologist Jeff Masters of Yale Climate Connections described the 'heat dome' as high pressure acting like a pot lid trapping hot air, while weather historian Chris Burt noted the event's scale likely dwarfs historic heat waves from 2012 and 2021.
  • On Friday, Arizona and California hit 112 degrees, smashing March records by 4 degrees. World Weather Attribution scientist Clair Barnes added the record heat was "virtually impossible" without climate change, which increased temperatures by at least 4.7 degrees.
  • Lower humidity levels make this event less dangerous than summer heat waves, Weather Prediction Center meteorologist Gregg Gallina noted, though the region faces potential power grid strain and blackout risks as cooling demand surges.
  • By late next week, the heat dome will dissipate, meteorologist Jeff Masters said: "We just have to give it time." Experts advise residents to stay hydrated and wear light-colored clothing as the system moves on.
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Bloomberg broke the news in United States on Sunday, March 22, 2026.
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