One of the most wonderful phenomena of the USA’s recent extreme cold weather was definitely Niagara Falls getting covered with ice. A polar vortex reached the northern states of the country and subzero temperatures remained for long days. This allowed the Falls to turn into breathtaking icy formations.
1. Polar Vortex, the undesired guest
The cold weather reached life-threatening levels at the beginning of January in the northeast of the USA, and the extreme windchill didn’t help either. Temperatures dropped as low as minus 55F in Minnesota, even the south pole was warmer at that time. Besides Minnesota, Chicago, Illinois, Michigan, and Wisconsin also declared emergencies.