The polar vortex of ultra-cold air usually stays penned up around the North Pole, spinning like a top. But sometimes it escapes or stretches down to the United States, Europe or Asia — and that’s when ...
Some 50 million people are under winter weather warnings as the first winter storm of the new year is slated to begin ...
Seven states declare emergencies as 63 million hit by arctic blast and travel chaos - Hundreds of flights have been canceled ...