A dangerous heat wave is hitting the eastern United States.

       On Monday, several cities broke records for the all-time hottest Labor Day ever, including Minneapolis at 98 degrees and Atlantic City, New Jersey, at 94 degrees.

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       On Tuesday, the heat will stretch from Minnesota to Texas to Massachusetts.

       An ice cream vendor walks along a path as beach-goers crowd Montrose Beach, Sept. 4, 2023, in Chicago.

       Kiichiro Sato/AP

       Temperatures could reach a scorching 99 degrees in Washington, D.C.; 91 degrees in New York City; 97 in Raleigh, North Carolina; 93 in Minneapolis; 91 in Chicago; 100 in Oklahoma City; and 102 in Dallas and San Antonio.

       ABC News

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       In Pittsburgh, many schools have shifted to remote learning due to the heat.

       In Washington, D.C., the mayor has activated a heat emergency.

       A Heat Emergency will be activated on Tuesday, September 5 at 11AM. Remember: Stay hydrated, limit sun exposure, and check on seniors, neighbors, and pets. If you see someone in need contact: e？？？Shelter Hotline: 202-399-7093 or 311 e？？·911 for an immediate safety risk pic.twitter.com/iULU0gdYhX

       — Mayor Muriel Bowser (@MayorBowser) September 5, 2023

       The heat will end over the next few days in the Midwest and the Great Lakes, but it'll remain in the South and the Northeast. In New York City, temperatures could reach 90 degrees three days in a row, marking the first heat wave of the season for the city.

       Today and tomorrow are going to be hot ones, NYC.Wea？？ve opened our cooling centers while the Heat Advisory is in place. Please remember to take care of yourself when youa？？re outdoors, and dona？？t forget to hydrate.Find cooling centers here: https://t.co/DKZHkaaNDD

       — Mayor Eric Adams (@NYCMayor) September 5, 2023

       ABC News

       By Friday, relief will move into the Northeast, with some showers and storms bringing cooler temperatures over the weekend.

       The heat will continue in the South from Texas to Florida, with record highs possible through the end of the week.

       Click here to learn what you need to know to stay safe in the heat.