Huge sections of the US are being scorched by a biting winter chill as a "bomb cyclone" sweeps through the States.
Ice and snow riding on the back of racing winds are set to batter several states as 150million Americans prepare for a bitter Christmas and sub-zero temperatures, which will spread as far south as Florida's Gulf Coast.
Travel chaos is expected as Delta, American, United, Frontier, Alaska, Southwest and other airlines cancelled or delayed flights around the country.
