The entire eastern half of the United States will experience above-average temperatures this week as a massive heat dome descends, impacting 147 million Americans. Until at least Thursday, 28 U.S. states from Texas to Maine will experience moderate to extreme heat waves,

Coming originally from the Pacific, a dome of high pressure is parking over the Eastern United States with hot air from the Southwest that already made an uncomfortable rest stop in the Midwest.

New York’s Central Park tied a record high of 96 degrees for the date Monday, which was set in 1888. In neighboring New Jersey, 16 people were sent to the emergency room following a sweltering set of graduations.