Much  mid- and northeastern America is  the middle  a deadly cold snap. Many states  Michigan in the north to Georgia in the south are experiencing freezing temperatures not experienced  decades. It is currently colder  many parts of the USA than it is in Antarctica. The cold spell is because  what is called a polar vortex. This is a swirling mass of air and wind that has come down  the Arctic, which is where the North Pole is. The government has declared states  emergency in Wisconsin, Illinois and Michigan. Many schools and businesses have been closed due to the extreme cold. People have been warned not to travel, and even not to go outside and breathe  the icy air.
The weather website AccuWeather said that the temperature  Thief River Falls, in the state  Minnesota, dropped to a real-feel minus sixty degrees Celsius. Many parts  the Chicago River turned to ice, Niagara Falls turned  a winter wonderland and parts  Lake Michigan froze . The bitter freeze is believed to be responsible  the deaths of at least eight people so far. Health officials are urging people to go outside only if it is absolutely necessary. They warned that exposing the skin to the freezing air was dangerous. It could lead to frostbite or breathing problems. People were also urged to be careful when shoveling snow outside and be careful  blocks  snow and ice falling  the roof.