America’s Independence Day holiday was disrupted by a dangerous combination of extreme heat and severe storms sweeping across a vast stretch of the country on Saturday.
More than 75 million people found themselves in the threat zone for severe storms, stretching from parts of the Plains all the way into the Northeast.
The primary hazard facing those regions was damaging wind gusts capable of causing widespread destruction to property and infrastructure.
The greatest threat on Saturday covered parts of the mid-Atlantic, including Washington, D.C., and Baltimore, as well as sections of Kansas and Oklahoma.
Those areas faced a level 3 of 5 severe weather risk, with numerous thunderstorms packing potentially destructive wind gusts expected to move through.
Severe Thunderstorm Watches were issued stretching from Missouri to upstate New York, capturing major cities including Chicago, Philadelphia, and New York City.
In New York City, organisers of the Macy’s Fourth of July fireworks moved the start time earlier than scheduled in order to beat the incoming storms.
Any slow-moving thunderstorms carrying torrential rain also posed the risk of triggering flash flooding in areas where the heaviest precipitation developed.
Amid the chaos, America’s National Independence Day Parade in Washington, D.C., scheduled for 10:30 AM on July 4, was cancelled due to extreme heat in the region.
The National Weather Service issued an Extreme Heat Warning for the District of Columbia, with heat index values expected to reach between 110°F and 115°F on the day.
Organisers said the decision was made after extensive consultation with the National Park Service, the District of Columbia City Government, and Freedom 250, prioritising the safety of participants, spectators, and staff.
As the nation marked its 250th birthday on Saturday, nearly 800,000 customers were reported without power, with outages spreading across multiple states.
The extreme heat placed significant strain on power grids in affected areas, contributing to the widespread failures experienced throughout the day.
Some relief arrived for parts of the Midwest, as well as upstate New York and northern New England, where temperatures eased slightly for the holiday.
More widespread relief was expected to sweep across much of the Northeast on Sunday, with New York City forecast to reach only the upper 80s and Boston the mid-70s.
Amtrak announced it would be cancelling a number of train services due to heat-related conditions affecting rail infrastructure across the country.