Thirteen states in the East from Massachusetts to Kentucky are on alert for more extreme heat before the dangerous temperatures move to the South and the West.
Record highs were shattered in New England on Thursday, including 99 degrees in Manchester, New Hampshire; 98 degrees in Hartford, Connecticut; and 97 in Augusta, Maine.
On Friday, the temperature is forecast to hit a scorching 98 degrees in Louisville, Kentucky; 84 degrees in Indianapolis; 96 degrees in Pittsburgh and Washington, D.C.; 95 in Philadelphia; and 92 in New York City.
In Philadelphia, this could be the longest stretch of 90-degree temperatures this early in the season in 30 years.
This weekend, the heat will spread into the South.
Washington, D.C., may hit 100 degrees this weekend, which would be the first time the city reached triple digits in June in 12 years.
Record highs are possible in Little Rock, Arkansas, by Monday.
