Residents in Northern states of the US have been told to stay indoors and not to breathe heavily whilst outdoors.
The warning comes as temperatures have plummeted to a staggering -20C in Chicago, whilst the coldest seen on Wednesday was in Norris Camp in Minnesota, were temperatures plummeted to -40C.
The deadly weather conditions is being caused by a polar vortex which is sweeping across the country.
In scenes from a Hollywood movie, the city of Chicago saw its river freeze, whilst ice formed all across the city.
It is expected that the weather will get worse in the city as temperatures are expected to drop as low as -28C.
Meanwhile in Minnesota, the deadly cold combined with wind child has seen temperatures feel like -50C.
The public have been warned not to venture outdoors unless its absolutely necessary and if they do they must not stay outdoors for too long.