Washington, United States – (Web Desk) A dangerous heat wave swept across large parts of the central and eastern United States, disrupting Independence Day (July 4) celebrations, forcing the cancellation of major public events, and placing significant strain on regional power grids.
Authorities in Washington, D.C., Philadelphia, Boston, New York, and several other cities postponed or canceled parades, concerts, fireworks displays, and outdoor gatherings as temperatures soared to dangerous levels.
One of the most affected events was the Great American State Fair on the National Mall in Washington, part of President Donald Trump’s initiative marking the 250th anniversary celebrations of the United States. The fair was temporarily closed after temperatures climbed to 38°C, while the National Park Service canceled the annual Independence Day Parade due to public safety concerns.
Meteorologists attributed the extreme weather to a powerful heat dome, a high-pressure system trapping hot air across much of the country. More than 185 million Americans—over half of the US population—remained under heat alerts, with heat index values forecast to reach 46°C in several regions.
The severe temperatures also put pressure on electricity networks. PJM Interconnection, the largest US power grid operator serving around 67 million people, urged customers to reduce electricity consumption due to soaring demand for air conditioning, transmission line overloads, and generator outages. In New York, utility provider Con Edison reported power outages affecting nearly 17,000 customers.
Cities across the East Coast announced additional cancellations, including Philadelphia’s Salute to Independence Parade, New Jersey’s Haddon Township July 4 Parade, and Watertown’s Independence Day concert and fireworks. Boston officials delayed entry to the city’s annual riverside fireworks celebration to reduce public exposure during peak afternoon temperatures.
Health authorities have urged residents to stay hydrated, avoid prolonged outdoor activity, seek shade, and remain alert for signs of heat-related illness as the dangerous weather continues.
