Freeze warnings issued as vast area of US gripped by wintry chill

Deep south hit by freezing temperatures and South Dakota sets record low Big turnout for Milwaukee's Polar Plunge despite hypothermia warnings Severe cold gripped much of the US as 2018 began, breaking century-old records and leading to several deaths that authorities attributed to exposure to the dangerously low temperatures. Related: Trump's call for some 'good old global warming' ridiculed by climate experts