Via AFP:
Millions of people hunkered down Sunday in America in anticipation of brutal weather from a dangerous Arctic blast that could send US temperatures plummeting to their coldest in 20 years.
The northeast of the country and parts of Canada have been in the grip of crippling heavy snow and deadly sub-zero conditions since the turn of the year and the deep freeze is now ripping through the US Midwest and threatening usually balmy areas further south.
The wind chill from the rare "polar vortex" could make it feel as cold as -60 Fahrenheit (-51 Celsius) in places, weather forecasters say, pro...
