As temperatures plunged, the tourist attraction on the US-Canada border gave those brave enough to venture out a sight they will never forget...
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After temperatures plunged to a sub-arctic -52C in parts of the US, the tourist attraction on the US-Canada border gave those brave enough to venture out a sight they will never forget.
These images - taken by Reuters photographer Aaron Harris yesterday - are mostly taken from the Canadian side and show the American falls, which have a drop of 170ft on to huge rocks below.
Twenty million people a year visit the three falls - the American Falls and Bridal Veil on the US side and Horseshoe Falls on the Canadian side - which on a normal day boast a volume of more than 500,000 litres of water a second.
The combined falls form the highest flow rate of any waterfall in the world.
The winter storms have whipped America into an ice cold frenzy with even Hell freezing over. 190million people have been affected.
The polar vortex is relatively commonplace in the Arctic, but it is extremely rare for it to move southwards towards North America.
Relief is on the way, as temperatures are expected to climb this weekend.