NEW : Power lines fall to about 1.7 million in five states . Deaths attributed to tornadoes rise to 13 . Trick - or - treat ##ers continue through November . Ground could ice up again , and fallen power lines remain a risk , officials say .
NEW : Power outages fall to about 1.7 million in five states . Deaths attributed to storm rise to 13 . Trick-or-treat postponements spread through Northeast . Roads could ice up again , and fallen power lines remain a risk , officials say .