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Severe Heat Wave Hits East Coast Ahead of July 4 Celebrations

KVIA•Thursday, July 2, 2026 at 4:06 AM•CNN Newsource

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A dangerous heat wave is impacting the East Coast just as millions prepare for Independence Day festivities. Temperatures are expected to soar into the upper 90s and low 100s from Washington, DC to Boston, with heat indices reaching as high as 110 degrees. Over 160 million people are under a major or extreme heat risk, prompting cities to activate cooling centers and emergency plans. Major cities like Philadelphia and Washington, DC, are implementing measures to protect residents and visitors from heat-related illnesses during this holiday weekend. The heat wave is exacerbated by climate change, with record temperatures anticipated across the region.

Key Details: • Heat indices may reach 110 degrees in New York City, with records expected to fall. • Philadelphia has declared a Heat Health Emergency through Saturday evening. • Washington, DC, has activated an Extreme Heat Alert through July 5. • Cooling centers and hydration stations are being expanded in major cities. • Expect high temperatures with little overnight relief, increasing health risks.

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People & Organizations

National Weather ServiceDepartment of EnergyWashington, DCNew York CityPhiladelphiaBostonRaleigh, North Carolina

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