India, Jan. 17 -- A major polar vortex is about to hit the US and people across the country might face frigid temperatures for weeks, with even a chance of snowfall in Florida. Fox Weather reported an estimated 170 million people are likely to be impacted by this weather phenomenon.

A polar vortex is a broad region of low pressure and frigid air that surrounds the earth's poles, as per the National Weather Service (NWS). While it is a year-round feature, it weakens in summer and strengthens in winters. When a strong polar vortex weakens by the North Pole, cold air seeps into the US. However, this time, vortex is stretching, which will allow the cold air to flow for longer and cover a larger area, as per Fox Weather.

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