A heat dome that enveloped the eastern United States pushed temperatures into triple digits over the Fourth of July weekend, disrupting the 250th Independence Day celebrations in Washington, DC.
Under an Extreme Heat Warning, the National Weather Service projected a heat index as high as 113 degrees. The sweltering conditions forced the cancellation of the Saturday morning parade and delayed the opening of the Great American State Fair on the National Mall.
Organizers coordinated with federal and local agencies to adjust event schedules and expand cooling resources, including water stations, cooling tents, and air‑conditioned buses. They urged attendees to stay hydrated, wear lightweight clothing, apply sunscreen, and seek shade to prevent heat‑related illness.
The Great American State Fair was temporarily closed for several hours on Friday, and visitors were advised to use alternative Metro stations to avoid crowded areas.
Philadelphia’s Fourth of July festivities were also altered by heat, with temperatures expected to reach 99 degrees. Plans to display a replica of George Washington’s Revolutionary War headquarters tent outside Independence Hall were scrapped due to the extreme heat.
The president and chief executive of the Museum of the American Revolution noted that Washington had retreated to the air‑conditioning amid the oppressive heat.
