Authorities in Louisiana have warned people to prepare for extreme cold in the coming days, and a map by Newsweek shows where the polar vortex sweeping across large parts of the U.S. will hit the state hardest.

Abnormal weather events and severe winter storms could be caused by a disrupted polar vortex. Find out here how the polar vortex affects the weather.

Very cold arctic air will interact with several systems to bring chances of freezing rain, sleet, and snow

Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.

A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by treacherous conditions.

Tens of millions of people were bracing Sunday for a massive winter storm forecast to bring the heaviest snowfall and coldest temperatures in over a decade to parts of the country.

An area stretching from Texas to Tennessee is bracing for the expected arrival of freezing rain and snow, as some other parts of the country that already received an arctic blast this week are prepari

DES MOINES, Iowa (AP) — The plunging polar vortex brought subfreezing temperatures Tuesday to some of the southernmost points of the U.S., threatening to dump snow on parts of Texas and Oklahoma ...

NORFOLK, Va. — The plunging polar vortex brought subfreezing temperatures Tuesday to some of the southernmost points of the U.S., threatening to dump snow on parts of Texas and Oklahoma in ...

The polar vortex of ultra-cold air usually spins around ... More than 50,000 customers were without power on Wednesday in Indiana, Kentucky, Louisiana, Virginia and West Virginia, according ...

A major cold blast is in store for millions of Americans as a lobe of a polar vortex will bring brutally cold temperatures to nearly every American east of the Rockies.

The polar vortex will extend into the metro St. Louis area Saturday bringing several days of temperatures plunging to single digits and wind chills below zero.