1/4 of the U.S. will experience below-zero temperatures this week. National Weather Service, Des Moines, Iowa, via statement Wednesday could be the <br />coldest day ever <br />recorded in Chicago, Mike Doll, AccuWeather Senior Meteorologist, via statement Wind chills as low as -55 in Chicago are "likely," 55 million people could experience temperatures below zero Wednesday morning. On the East Coast, Wednesday night lows could reach <br />6 degrees in New York, 7 degrees in Philadelphia and <br />9 degrees in Washington, D.C.
