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Extraordinary heat in US Northeast arrives to clash with Fourth of July revelry

More than 230 million Americans face record-breaking temperatures as cities open cooling centers and officials warn the heat could last through the holiday weekend.

  • More than 230 million Americans face a dangerous heat wave this week that could shatter temperature records, with the National Weather Service warning heat index values will surge over 110 degrees across the Northeast and Midwest.
  • A "heat dome"—high-pressure systems trapping heat—is smothering the country, with overnight temperatures expected to remain above 80 degrees. "The concentration of concrete, asphalt, steel, all of those materials help to retain heat," said Vijay Limaye, a climate scientist at the Natural Resources Defense Council.
  • Since 2019, heat deaths among Black residents have risen 30%, while historically redlined neighborhoods remain nearly 5 degrees hotter than non-redlined areas. Karen Leader of Brooklyn called the lack of air conditioning "a type of discrimination."
  • Mayors across the country are activating emergency response plans and opening cooling centers nationwide. New York Mayor Zohran Mamdani deployed more than 200 teams to check on unhoused residents, warning that "the heat is something that is underestimated."
  • Emergency planners warn current strategies may fail during holiday celebrations, as Joshua DeVincenzo, assistant director of applied research at Columbia University's National Center for Disaster Preparedness, noted that planning often assumes residents have access to mitigation tools.
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Associated Press NewsAssociated Press News
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Extraordinary heat in US Northeast arrives to clash with Fourth of July revelry

Multiday warnings of extreme heat have landed in New York, Boston and Philadelphia. The sultry weather has pushed east just ahead of weekend Fourth of July events in a region that revels in its role as a cornerstone of U.S. independence.

·New York, United States
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Gettysburg Connection broke the news in Gettysburg, United States on Wednesday, July 1, 2026.
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