A severe heat wave across the eastern and central United States has disrupted preparations for the country’s 250th anniversary celebrations, forcing several cities to cancel or delay public events and raising concerns over pressure on the power grid.
Temperatures in some areas have reached around 40°C, while the heat index has climbed even higher. Authorities in major cities, including Philadelphia and Boston, have adjusted or postponed traditional parades and concerts due to public safety concerns.
In Washington, emergency services reported dozens of heat-related incidents during a major public event connected to the national celebrations. Several people were taken to hospital after suffering symptoms linked to extreme heat. The event was temporarily closed before later reopening.
Despite the dangerous weather conditions, Washington is preparing a large fireworks display, with organisers aiming to launch hundreds of thousands of fireworks. The plan has attracted criticism from environmental and health experts, who warn that such a large pyrotechnic show could worsen air quality during an already difficult weather situation.
The heat wave has also created serious pressure on the electricity system. High demand for air conditioning, combined with rising energy use from artificial intelligence data centres, has increased concerns about the stability of the power grid.
In parts of New York, energy provider Con Edison introduced controlled power interruptions in some areas in order to prevent a wider blackout. The company said such measures were necessary to protect the network during peak demand.
Weather problems have also affected other parts of the country. In South Dakota, strong thunderstorms were reported near Mount Rushmore, where a major political event was scheduled to take place. Despite the storm warnings, the White House confirmed that President Donald Trump’s appearance would go ahead as planned.
The situation highlights the growing challenge of organising large public events during extreme weather. Experts say that heat waves are becoming a bigger risk for cities, energy systems and public health, especially during summer holidays and mass gatherings.
Officials continue to urge people to stay hydrated, avoid long exposure to direct sunlight and check on vulnerable relatives and neighbours as the extreme temperatures continue.
