Source: International Business Times
People walk with umbrellas during a heat wave in Manhattan on July 02, 2026, in New York City. New York City has issued an extreme heat warning as temperatures are expected to rise over 100 degrees over the next few days, creating dangerous conditions for those who work outside or do not have access to air conditioning. Getty Images With more than 200 million Americans currently under heat alerts as a potentially historic heat dome blankets the eastern two-thirds of the country heading into the July 4 weekend, a growing body of research makes one thing clear: extreme heat is the most lethal form of extreme weather in the United States — and the federal government has no disaster infrastructure built to fight it.
