Hundreds of National Guard troops have been mobilized in ice-stricken Mississippi and Tennessee to clear debris and help people stranded in cars and homes still without power as the Southern states brace for another blast of dangerous cold weather. Nearly 1,000 linemen were working Thursday to restore lingering outages in Nashville, Tennessee The National Weather Service says arctic air moving into the Southeast will cause temperatures to plunge into the teens Friday night in cities like Nashville, where more than 79,000 homes and businesses still had no electricity five days after a massive storm dumped snow and ice across the eastern U.S. People stuck at home without power are growing increasingly desperate in the South, a region that's not used to prolonged cold.