The upcoming polar vortex will bring arctic air from Canada down ... Caulk gaps and openings around windows, doors, air conditioners, and mail chutes to prevent cold air from entering.

Around 40 million people, primarily across the southern U.S. from Texas to Florida, were under some type of weather hazard.

A polar vortex is bringing arctic air into the country next week. Forecast maps show when freezing temperatures will sweep ...