By Patrick Wingrove NEW YORK (Reuters) -Tens of millions of people in major cities across the U.S. Northeast are facing record high temperatures on Tuesday on what was expected to be the worst day of an oppressive heat wave that has spread over much of the country since late last week.

Boston recorded its first official heat wave of 2025 and hit 100 degrees today, as extreme weather set new temperature records.

The combination of scorching temperatures and tropical-feeling air made it feel like it's up to 110 degrees in some parts of the state.

A long-lasting extreme heat wave reached its dangerous crescendo Tuesday, bringing the hottest day in a decade to some major East Coast cities and putting millions of already fatigued Americans at risk.

The temperature in New York City reached 100 degrees Tuesday as the eastern U.S. sweltered under an extreme heat wave. Kennedy International Airport recorded 100 degrees Fahrenheit at midday, according to the National Weather Service.