People brave the cold on the Brooklyn Bridge in New York City ahead of Winter Storm Fern

People brave the cold on the Brooklyn Bridge in New York City ahead of Winter Storm Fern

An unusually brutal winter storm is set to pummel more than 160 million Americans from Friday, as a stretched "polar vortex" sends a devastating blast of Arctic air, bringing heavy snows and freezing rains.

Winter Storm Fern is forecast to engulf an area well over half the length of the continental United States, stretching from Texas and the Great Plains region to the mid-Atlantic and northeastern states.

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