Boiling water trick shows how cold it is in America

A cup of boiling water turns to ice before it hits the ground in Minneapolis, Minnesota. Credit: ITV News

ITV News' well wrapped-up US correspondent Robert Moore braves "historic and dangerous" weather conditions to show how cold it is in Minneapolis, Minnesota - using a cup of boiling water:

Minnesota closed all its public schools today for the first time in 17 years due to the weather.

Read: Near record low temperatures in Chicago

"If you've got to look ridiculous, look ridiculous, but stay warm."

A Chicago resident advises on how to stay safe in dangerous conditions: