A record-setting cold snap in parts of Canada and the US will see wind chill temperatures dropping to minus 50 degrees Celsius or colder.

A record-setting cold snap in parts of Canada and the US will see wind chill temperatures dropping to minus 50 degrees Celsius or colder. With temperatures that low, exposed skin can freeze in seconds, increasing the risk of frostbite and other cold-related ailments such as hypothermia. As a result, authorities in several areas have closed schools and other essential services. The governor of Illinois has gone one step further and declared the entire state a disaster area.