Large parts of the United States are bracing for freezing cold as a polar vortex is expected to drive temperatures to as low as -50C.
In Chicago, residents have been battling the elements as at least 20 centimetres of snow fell on Sunday.
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.