Heat wave expected across eastern and central U.S. during July 4 weekend

A large heat dome formed by the merger of two smaller systems will cover much of the eastern and central United States from Thursday through Saturday, the National Weather Service said. More than 250 million residents are forecast to face high temperatures and humidity. Record or near-record highs at or above 100 degrees are expected in multiple areas during the three-day period.

events Festivities on the National Mall will continue through Saturday, including the ongoing Great American State Fair, a parade on Independence Avenue, a reading of the Declaration of Independence at the National Archives, and a free concert at the U.S. Capitol.

President Trump is scheduled to speak on the National Mall after sundown on Saturday, followed by a fireworks display of 850,000 pyrotechnics over 40 minutes. , and overnight lows are forecast to remain in the 80s with high humidity.

Additional cities affected New York City is projected to record its sixth-worst heat wave since 2000, with Central Park temperatures possibly exceeding 100 degrees for the first time in more than a decade. Heat indices of 105 to 115 degrees are forecast across much of the Midwest. The same weather pattern is expected to reach parts of New England, the Southeast, and the Great Plains.

Safety guidance The American Red Cross recommends drinking water, avoiding sugary or alcoholic beverages, wearing light clothing, and spending time in air conditioning. Officials advise scheduling outdoor activities for early morning or evening hours and monitoring for signs of heat-related illness.