NYC Declares State of Emergency, Opens 500 Cooling Centers as Extreme Heat Above 100°F Hits During Primary Election with 445,000 Voters

New York City is experiencing an extreme heat wave with temperatures reaching or exceeding 100 degrees Fahrenheit over several consecutive days, accompanied by high humidity and feels-like temperatures near 110 degrees. The National Weather Service has issued an Extreme Heat Warning in effect through Tuesday night, with the heatwave expected to continue into the following days. In response, the city has declared a State of Emergency and opened 500 cooling centers across all five boroughs to provide relief, especially for vulnerable populations such as older adults and those without air conditioning. Officials urge residents to stay hydrated, limit outdoor activities, use air conditioning when possible, and check on neighbors.

The heat wave coincided with New York City's primary election day on June 24, 2025, where more than 445,000 voters turned out despite the dangerous conditions. Authorities emphasized the importance of voting safely by avoiding the hottest parts of the day and making use of cooling centers. Similar heat advisories and precautions were issued in other regions, including Washington, D.C. and Massachusetts, where cooling centers have also been made available. Public health messages stress the risks of heat-related illnesses and deaths, noting that most heat-related fatalities in NYC occur indoors without air conditioning. Residents are encouraged to plan, prepare, and stay informed through official channels such as 311 and local government websites.