Chicago residents braved the outdoors today as a blast of Arctic air grips the mid-section of the US.
America is expecting its coldest temperatures in two decades, with meteorologists warning that temperatures were dangerously cold and life-threatening in some places.
Temperatures of -18 were recorded in Chicago - nicknamed "Chiberia" - St. Louis and Indianapolis, with the chill set to bear down on eastern and southern states as the day wears on.
As much of the US experiences a dangerous and severe cold spell, does the UK have anything to worry about?
As the US battles sub-zero temperatures, ITV News Washington correspondent Robert Moore illustrates just how cold it is in Minnesota.
Leaders across America are urging residents to stay in their homes as "polar vortex" batters the east coast after snowstorm Hercules.