. >> reporter: on chicago's south side, beverly and michael allison are among the half million who lost power on wednesday. just as the outside temperatures plunged into the single digits. now, their only source of warmth are the coats and hats they wear to bed. >> my snow boots, and i have five layers of clothes on. >> oh, my gosh! >> reporter: the frigid temperatures and widespread power outages were lingering elements of the 2000-mile-long winter storm that brutalized 30 states this week. dumping snow and ice along its path from texas to new england. in milwaukee, three senior citizens died while clearing heavy snow. >> most wonderful man ever. ever. >> reporter: among them, 66-year-old robert knapp who collapsed while shoveling his sidewalk. nationwide, the storm has claimed the lives of at least 12 people. >> bring us snow, not ice. >> reporter: the freeze caused rolling power blackouts throughout texas, including dallas, host city of the super bowl. new trouble was around the corner, especially at intersections with blacked-out traffic lights. in indianapolis, a man was saved just