Meteorologists say a phenomenon known as a heat dome, a large area of high pressure in the upper atmosphere that traps heat ...

Dangerous Midwest, Northeast heat wave brings hottest weather of year so far in Chicago and New York—hydration, cooling ...

Extreme humidity and heat will affect about 265 million people across the country this week. Maps show where and when to ...

A multiday heat wave is bringing high temperatures and health risks from the Midwest to the Northeast, prompting warnings and ...

The heat wave is expected to continue into the week putting millions of Americans in the Midwest and Northeast under heat ...

Heat advisories and extreme heat watches are in place across much of the U.S., lasting until Tuesday with the potential to be ...