Tens of millions of people in the United States are bracing for a potentially life-threatening deep arctic chill forecast to hit swaths of the country on Wednesday. The US Postal Service — known for its commitment to bringing the mail whatever the weather — has even reportedly suspended deliveries in Iowa due to the severe cold. Temperatures in almost a dozen states stretching more than 1,200 miles (1,930 kilometers) from the Dakotas to Ohio were forecast to be the coldest in a generation, if not on record.
