Thirty-eight million people are under a heat alert on Monday as dangerously high temperatures will sweep across the Midwest.
A heat warning has been issued for Chicago, where the heat index – how the temperature feels with humidity – could reach a scorching 110 degrees on Monday and Tuesday.
The cities of Minneapolis; Madison, Wisconsin; and Omaha, Nebraska, are also under excessive heat warnings. Heat indexes could climb as high as 115 degrees in those cities on Monday.
In Detroit, public schools will let out three hours early Monday and Tuesday because of the heat.
The heat spreads east and south during the week. Record highs are possible from Chicago to Louisville, Kentucky, on Tuesday and from Nashville, Tennessee, to Washington, DC, on Wednesday.
This comes after record high temperatures in Texas this weekend. Amarillo climbed to a record 104 degrees on Sunday.
There are hundreds of deaths each year in the United States due to excessive heat, according to CDC WONDER, an online database, and researchers warn that the actual number of heat-related deaths is likely higher.
Click here for tips on how to stay safe in the heat.