A significant heatwave is sweeping across the eastern United States, with temperatures threatening to break records in cities like New York City, Philadelphia, and Washington, D.C. Starting Wednesday, Central Park is projected to reach 86°F, just shy of the record 87°F set in 1941. Philadelphia may see a high of 92°F, while Washington, D.C., could hit 94°F. Meteorologists note that this early-season heat, while not accompanied by high humidity, poses risks as people are not yet acclimated to such conditions. Vulnerable groups, including infants, the elderly, and those with health issues, are particularly at risk. The heatwave is expected to persist through Friday, with temperatures in the lower to middle 90s across the Carolinas, potentially setting additional records. Relief is anticipated by Sunday when a cold front is expected to move in, bringing cooler temperatures by Monday.