New York City is under a dire weather warning for the upcoming Fourth of July holiday, as a five-day heat dome is set to bring sweltering temperatures, potentially making it the hottest Independence Day celebration in nearly 20 years. AccuWeather senior meteorologist Matt Benz stated that temperatures could reach 95 degrees Fahrenheit on Saturday, a level not seen on July 4th since 2010 when the city recorded 96 degrees.
Last year, the Fourth of July in New York City saw temperatures around 83 degrees. This year's heat wave is expected to begin Friday night and persist through the weekend. The potential for torrential rains, damaging winds, and hail is projected to hit during the holiday festivities on Saturday afternoon and evening.
"When these heat waves start to break down, they tend to unleash thunderstorms, but the timing – especially this far out – is difficult to pin down," Benz explained. Current forecasts indicate a 40% chance of rain on Saturday, with storm systems being monitored in Canada.
The expected downpours are anticipated to arrive as the brutal heat wave begins to subside. The city could experience temperatures around 95 degrees on Wednesday, potentially nearing 100 degrees on Thursday and Friday, before easing into the low 90s on Sunday. "Real-feel" temperatures during the peak of the heat wave are predicted to range between 105 and 110 degrees due to high humidity. Overnight temperatures are not expected to offer much relief, remaining around 80 degrees.
"That’s what will make this especially dangerous," Benz noted, emphasizing the impact of prolonged high temperatures, particularly for those without air conditioning. "We focus on the high temperatures, but it’s the overnights, especially if you don’t have AC, where it just becomes tight, like when we’re sleeping."
Authorities are urging residents and visitors to take precautions. Benz advised drinking plenty of water, monitoring the forecast, conserving energy, and staying indoors when possible. The National Weather Service has issued an extreme heat watch for New York City, the Lower Hudson Valley, Long Island, northern New Jersey, and western Connecticut, in effect from noon Wednesday through 9 p.m. Saturday. An extreme heat warning was also issued for Wednesday.
New York Governor Kathy Hochul confirmed that the state is closely monitoring the heat wave. Efforts are underway to coordinate cooling centers and assess the capacity of the state's electrical grid. "This week will bring dangerous heat all across the state, and my administration is taking action to ensure New Yorkers can safely enjoy our historic summer of activities," Hochul stated. She encouraged New Yorkers to take necessary precautions, stay hydrated, limit outdoor exposure, and check on vulnerable neighbors.
Major events are planned across the city to mark America's 250th anniversary, including Saturday's Sail4th 250 & Macy's Fireworks display on the Hudson River. These events are expected to draw large crowds to waterfront areas in Manhattan, Brooklyn, and New Jersey, underscoring the importance of heeding the weather warnings.