A high school student from China takes a selfie along Lake Michigan on Jan. 29. — EPA Get ready for a deep freeze, America. The polar vortex is gearing up to unleash an Arctic blast, sending bone-chilling cold across much of the United States this weekend. Football fans in...source https://www.thenews.com.pk/latest/1147090-polar-vortex-to-plunges-us-into-bone-chilling-arctic-grip
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