It is cold in a lot of America, from the north to the . It is than in Antarctica. The cold is of a polar vortex - freezing air and from the Arctic. This hasn't happened for . There is a state of in Wisconsin, Illinois and Michigan. Many schools and have closed because of the cold. People were told to travel. They were told not to go outside or breathe the air.
The in a part of Minnesota fell to -60º Celsius. Parts of the Chicago River, Lake Michigan and Niagara Falls turned to . The weather is for the deaths of eight . Health told people to go outside only if . Letting freezing air get on the can be dangerous. It could lead to breathing . Shoveling snow can be . People should also be careful of snow and ice falling from the .