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Polar vortex 2019 - A satellite image shows the polar vortex covering part of the US and Canada.

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Sunrise - Despite the fact that the temperature is dipping to -50ºF (-45ºC) with wind chill, photographers are braving the cold to take a picture of this gorgeous sunrise. 

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Cracking - A pedestrian takes a photo of the frozen Chicago River.

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Skyline - A pedestrian braves the cold with Chicago's skyline as the backdrop.

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Little house on the prairie - A lone house stands in the midst of a white blanket in Ottawa, Illinois. 

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Ice approaching - Ice on Lake Michigan is slowly enclosing around Chicago.

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Lake Michigan - Ice covers Lake Michigan in Chicago, Illinois.

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Inner-city freeze - A pedestrian walks by the Chicago River during the extreme cold wave.

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Blanket of snow - While a fresh blanket of snow is nothing new for Chicago, the freezing temperatures accompanying it are record-breaking. 

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Miles of snow - A shot of the snow-covered cityscape of Chicago that expands far into the distance. 

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Breaking through the ice - A tugboat breaks through the ice on the Chicago River.

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Cross-country skiing - A man cross-country skis in the snow in Buffalo, New York.

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Toiling tugboat - Tugboat James J. Versluis breaks through the frozen waters of the Chicago River.

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Reflections - An eagle-eye view of the serene and freezing Chicago.

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Ghost town - A man walks along a cold Chicago street.

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Solo traveler - A pedestrian walks along the lakefront in Chicago.

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Sub-zero steam - Steam fills the streets of Chicago as sub-zero temperatures hit the city.

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Billows - A man takes a photo of Chicago's buildings by the frozen lake.

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Snow-covered lane - A car surrounded by snow in Lincoln Parkway, Buffalo, New York.

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St. Joseph - Lake Michigan is completely frozen in St. Joseph, Michigan.

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Niagara Falls - The iconic Niagara Falls frozen by the arctic air.

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Horseshoe Falls - Horseshoe Falls surrounded by ice and snow, Niagara Falls, Ontario, Canada.

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Branches - Branches in Horseshoe Falls covered in ice and snow at Niagara Falls, Ontario, Canada.

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Winter wonderland - The White House at night during winter storm Gia, Washington. 

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Dedication - A jogger runs through the snow in front of the Washington Monument. 

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Arlington National Cemetery - Arlington National Cemetery in Virginia covered in snow.

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