Heat Wave Prompts Cancellations and Schedule Changes at U.S. 250th Anniversary Events

An intense heat wave has forced cancellations and schedule changes at multiple events marking the United States' 250th anniversary across the eastern states. The Great American State Fair on the National Mall in Washington, DC, closed temporarily on July 3 after temperatures exceeded 39 degrees Celsius in parts of the capital.

Philadelphia officials cancelled the Salute to Independence Semiquincentennial Parade, while Norristown and Lower Windsor Township in Pennsylvania also scrapped or postponed parades citing safety concerns.

The anniversary commemorates the adoption of the Declaration of Independence on July 4, 1776. A decade ago Congress created the America250 commission to organize events. In 2025 President Donald Trump issued an executive order that placed his Freedom 250 committee in charge of several major activities, including the Great American State Fair.

Several musicians withdrew from the fair in late May and early June. Trump opened the fair last week with a speech in which he described himself as the "Number One Attraction anywhere in the World" and promised "the most spectacular TRUMP RALLY of them all" along with "the largest fireworks show in history" for July 4.

Amtrak cancelled several trains in the northeast and warned that extreme heat can cause rail, bridges and overhead wires to expand, potentially requiring speed restrictions.

Air temperatures in Philadelphia and Boston are forecast to reach around 38 degrees Celsius over the weekend. New York City deployed more than 200 teams of workers and volunteers to check on homeless residents and direct people to cooling centers. Mayor Zohran Mamdani urged residents to stay inside and avoid "extraordinary temperatures" while setting air conditioners to 26 degrees Celsius.