FLASH FREEZE Major US cities to be battered by TWO raging snowstorms this week as polar vortex sends temperatures plummeting to 0F Updated: 9 Feb 2021, 0:48 CITIES across the nation are expected to get hit by a major polar vortex this week that will drop all 50 states - including Hawaii - well below freezing, with some hitting as low as 0 degrees Fahrenheit. Barely a week after major cities across the country were hit by two blizzards, a polar vortex is shifting south and is sending chills so cold, it would only take 30 minutes for frostbite to occur. 9 9 Cities like New York and Chicago were already pummeled by dozens of inches of snow last weekCredit: Getty Images - Getty