A lot of America is in the of a deadly cold . Many states from the north to the south have freezing temperatures. This hasn't happened for . It is currently in some parts of the USA than in Antarctica. The cold spell is because of a polar . This is freezing air and from the Arctic. The government has declared a state of in Wisconsin, Illinois and Michigan. Many schools and have closed because of the cold. People were warned not to travel, and even not to go outside or breathe in the icy .
A weather website said that the in one part of Minnesota fell to a real-feel -60º Celsius. Many of the Chicago River and Niagara Falls turned to . Parts of Lake Michigan froze over. The freeze is responsible for the deaths of at least eight people. Health are telling people to go outside only if it is . They warned that letting the freezing air get on the was dangerous. It could lead to or breathing problems. People were also told to be careful shoveling snow outside. People should be careful of snow and ice falling from the .