Chicago, has been struck by a polar vortex and the local temperature has dropped to minus 30 degrees Celsius.
Authorities in Illinois have announced a state of emergency, and schools, parks and museums across Chicago have been ordered to be closed.
The extremely cold weather has forced residents to stay indoors and the U.S. Postal Service and passenger railroad service Amtrak have also suspended service.
The Department of Family and Support Services is helping the city’s homeless move to warming centers that are run by public institutions or charities.