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

NEW YORK (AP) — Extensive triple digit heat, broken temperature records and oppressive humidity piled up into a steaming mess as the heat dome crushing the Eastern half of the nation sizzled to what should be its worst Tuesday.

Boston recorded its first official heat wave of 2025 and hit 101 degrees today, as extreme weather set new temperature records in the city.It wasn't just a record-setting day, it was a record-smashing day.