The mass of frigid air known as the Polar Vortex is expanding south and east, bringing more of the US into a deep freeze. Forecasters say up to 187 million people could feel the effects of the cold weather.
Polar Vortex Expands to South, East
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The mass of frigid air known as the Polar Vortex is expanding south and east, bringing more of the US into a deep freeze. Forecasters say up to 187 million people could feel the effects of the cold weather.
