Record-breaking cold hits half of the US

More than 200 million Americans were under winter weather advisories on Thursday night due to the icy and snowy conditions.

Winter storm: Brutal arctic blast expands its reach as the South

Chart: U.S. Bracing for Record Breaking Cold Spell

U.S. hit by dangerously cold temperatures as Arctic blast spreads

Winter storm live updates: Extreme cold weather descends across nation

Brutal' Arctic blast expected to bring frigid temperatures to

Canadians coping with multiple winter weather extremes this

Canadians coping with multiple winter weather extremes this

U.S. Natural Gas Demand Hits Record High Amid Severe Cold Snap

Weekend of Arctic storms could break low-temperature records in

Arctic blast to bring coldest temperatures of winter to big part

Latest on US Arctic Outbreak: A record-breaking cold for many

Understanding the Arctic polar vortex