More than 200 million Americans are bracing for a historic Arctic outbreak as a displaced polar vortex sends frigid air ...

"Arctic air will bring near record cold temperatures and dangerous wind chills," the National Weather Service said.

The coldest air of the season is blanketing the Midwest, Northeast, and Southeast, with dangerous low temperatures. More than ...

A displaced and stretched polar vortex will send multiple waves of Arctic air into the central and eastern United States ...

The current polar vortex event is triggering some of the lowest temperatures of the season and is impacting Americans in ...

The coldest air of the early winter season is blasting the eastern U.S. with single-digit temperatures with the wind chill, ...

The first of three rounds of bitter air has arrived, threatening record lows in cities from the Midwest to the Northeast.

Temperatures across Indiana are forecast to plunge into some of the coldest in the U.S., dipping well below zero as a surge ...

The Upper Midwest and Northern Plains have been hit by Canada's freezing temperatures. On Thursday, Dec. 4, wind chills between negative 10 to negative 25 degrees will be expected, and the cold ...

The polar vortex is a circular current of strong winds high in the atmosphere over the Arctic that keeps brutally cold air locked up in that region. Recently, though, it weakened and slid southward ...

A spurt of dangerously cold air is going to move into the area throughout today and linger over us through the weekend. A ...

Low temperatures on Monday night could fall into the single digits and challenge record in some parts of New Jersey.