Brutal heatwave scorches eastern US ahead of Fourth of July weekend

A dangerous and prolonged heatwave is intensifying across the central and eastern United States, expected to persist through the Fourth of July weekend. The National Weather Service warns that temperatures between 95-105°F, combined with high humidity, will create heat index values of 100-115°F in affected regions, including the Midwest, Ohio Valley, and East Coast. Numerous daily, and potentially monthly and all-time, temperature records are anticipated. Officials emphasize that extreme heat is a deadly hazard and advise limiting outdoor time, staying hydrated, and seeking air-conditioned spaces. Cities like New York and Washington D.C. are implementing measures such as deploying cooling vans and urging residents to adjust holiday plans due to the extreme conditions.

A significant heatwave is impacting the central and eastern United States, driven by a "heat dome" phenomenon. This weather pattern, characterized by a large area of high pressure trapping hot air near the ground, is causing oppressively high temperatures and humidity, with some areas potentially feeling as hot as 46 degrees Celsius (115 degrees Fahrenheit). Over 60 million people are under heat alerts, and numerous temperature records are expected to be broken. The dangerous heat is forecast to last for several days, extending through the Fourth of July weekend and impacting major cities like New York, Philadelphia, and Chicago, some of which are also hosting FIFA World Cup events. Cities are implementing emergency measures, including opening cooling centers and adjusting event schedules, to protect residents from the extreme conditions.