Brutally cold 'polar vortex' bears down on East Coast, freezes train for 9 hours
Monday, January 6, 2014 - 06:30
in Earth & Climate
Bone-chilling temperatures caused by a "polar vortex" sweeping the United States were due to reach the East Coast Monday morning, after record lows forced the cancellation of thousands of flights and even froze the engines of an Amtrak train for nine hours.