Britain is not the only country suffering under unusual weather. A "polar vortex", a whirlpool of dense air, has struck the US mainland in recent days, encasing much of the country in ice and snow.
- Polar Vortex Forces America's Homeless To Find Warmth Against Steam Grates
- Niagara Freeze! World Famous Waterfalls Stopped In Their Tracks
Lake Michigan Now Teeming With Ice Balls
In the Midwest, the cold snap has broken all recent records with sub-zero temperatures bringing more than a foot of snow, while high winds have forced cities in the region to close schools.
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Chicago on Lake Michigan has been particularly badly affected. Here are ten stunning pictures of the Windy City wrapped in ice.