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Persistent Heat Dome Envelops Eastern U.S., Leaves 80 Million Facing Extreme Heat

Scattered storms from a slow-moving cold front this weekend will offer minimal overnight cooling before a forecast pattern shift brings relief in early August.

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A person kayaks along the Stones River during a heat advisory, Friday, July 25, 2025, in Murfreesboro, Tenn. (AP Photo/George Walker IV)

Overview

  • A stubborn upper-level ridge has trapped scorching air over the Southeast and Midwest, prompting National Weather Service heat advisories, extreme warnings and highest-level HeatRisk alerts for over 80 million people.
  • More than 30 million residents in the Southeast remain under Level 4 Extreme HeatRisk alerts through July 31, with heat index readings forecast to spike as high as 115°F.
  • Nighttime lows in the 70s and dew points hovering near 70°F are limiting relief and elevating risks of heat exhaustion, heat stroke and other heat-related illnesses.
  • A sluggish cold front will trigger scattered downpours and gusty storms this weekend, but widespread humidity will persist into next week, offering little lasting cooling.
  • Authorities have opened cooling centers, issued air quality alerts and warned vulnerable populations to stay hydrated and seek air-conditioned spaces until temperatures ease in early August.