WASHINGTON (MNN); A severe heat wave sweeping across the central and eastern United States disrupted Independence Day celebrations on Friday, forcing authorities to cancel or postpone dozens of parades, concerts and fireworks displays as temperatures soared to dangerous levels.
One of the major events affected was the Great American State Fair on the National Mall in Washington, D.C., a flagship attraction of President Donald Trump’s nationwide campaign to commemorate the United States’ upcoming 250th anniversary.
Organisers temporarily suspended activities at the fair on Friday afternoon after temperatures climbed to 38 degrees Celsius, raising concerns over public safety.
Later in the day, the National Park Service announced the cancellation of Washington’s annual Independence Day Parade, citing extreme heat and safety risks. The parade had been scheduled for Saturday, with meteorologists forecasting a heat index of up to 115 degrees Fahrenheit (46°C).
The ongoing heat wave has been driven by a powerful “heat dome”—a high-pressure weather system trapping hot air over much of the country—which has pushed record-breaking temperatures from the Midwest into the eastern United States while significantly increasing humidity levels.
The extreme weather has also placed enormous pressure on the country’s electricity infrastructure.
PJM Interconnection, the largest power grid operator in the United States serving nearly 67 million people across the Mid-Atlantic, the South and Washington, D.C., activated emergency conservation measures, urging participating customers to reduce electricity consumption.
Grid officials said the move was necessary because of soaring demand for air conditioning, transmission line overloads and temporary generator outages caused by the prolonged heat.
Meanwhile, in New York, utility company Con Edison reported that approximately 17,000 customers were without electricity by Friday afternoon and appealed to residents of New York City and Westchester County to conserve power as electricity demand continued to rise.
The blistering temperatures also affected daily life across major cities.
In Manhattan, intense heat softened road surfaces, causing the adhesive on shoe soles to melt against sidewalks. Despite the oppressive conditions, large crowds gathered outside Madison Square Garden, where celebrities were expected to attend the widely anticipated wedding celebration of pop superstar Taylor Swift and NFL star Travis Kelce.
Workers directing arriving guests battled the heat with water bottles and towels as temperatures continued climbing throughout the day.
According to the National Weather Service, more than 185 million Americans—over half of the country’s population—were under heat advisories on Friday, with several cities recording or approaching all-time temperature records.
Weather experts and government officials warned that prolonged exposure to the extreme heat could be life-threatening and urged people celebrating outdoors to remain hydrated, seek shade and watch for symptoms of heat exhaustion and heatstroke.
The severe weather also disrupted Independence Day festivities across the eastern seaboard.
In Philadelphia, officials cancelled the city’s traditional Salute to Independence Parade after temperatures reached 103 degrees Fahrenheit, matching a record set in 1901.
In Haddon Township, New Jersey, authorities called off the annual Fourth of July parade, while Watertown, New York, cancelled both its Independence Day concert and fireworks display.
Officials in Boston also adjusted celebrations by delaying public entry to the city’s annual riverside fireworks event by four hours to reduce exposure during the hottest part of the day.
Authorities continue to monitor weather conditions as the dangerous heat wave is expected to persist across several parts of the United States during the Independence Day holiday weekend.
