The National Weather Service urged people to avoid travel if a flash flood warning was in place for their area.

At least nine states along the East Coast faced summer swelter on Monday, and the steamy weather is expected to persist on ...

A brutal heat wave across the eastern United States trapped millions of people in sweltering air this week with record-high temperatures.

Temperatures will surge well into the 90s across the Northeast and Mid-Atlantic early next week as another wave of hot and ...

Maps show where extreme humidity and 90- or 100-degree temperatures will affect about 255 million people across the United States.