America's deadliest weather hazard strikes again. A prolonged heat dome stretching from the Midwest to the East Coast has killed at least 24 people over the past week, with roughly 40 million still under heat alerts. New Jersey alone reported 22 heat-related deaths, and record-breaking temperatures were set across dozens of sites over the Independence Day weekend.
A relentless heat dome blanketing much of the eastern United States has turned into one of the summer's deadliest weather events, claiming at least 24 lives in just one week. New Jersey bore the brunt, reporting 22 heat-related deaths over the weekend, while additional fatalities were confirmed in Cook County, Illinois, and Hinds County, Mississippi. Around 40 million people remained under heat alerts as of Sunday.
The heat shattered records across the country. Washington D.C.'s Reagan National Airport logged back-to-back temperature records — 102°F on July 3 and a historic 103°F on July 4. Climate scientists warn this is part of a broader trend: human-caused climate change is making heat waves longer, hotter, and more frequent. A stark reminder came from Europe, where an estimated 20,000 people died from extreme heat last month alone.
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Why it matters: Extreme heat is the deadliest weather hazard in the U.S., yet it often receives less attention than hurricanes or tornadoes. As climate change intensifies heat events, healthcare providers and public health officials face growing pressure to protect vulnerable populations — especially those without access to adequate cooling or hydration.
