NEW : About 578,000 in at least three states without power after snow , ice storm . NEW : Thousands of utility workers flood storm-damaged states to fix lines . Comment: Central U.S. to remain cold , but next storm unlikely to cause major problems .
NEW : About 578,000 in at least three states without power after snow , ice storm . NEW : Thousands of utility workers flood storm-damaged states to fix lines . `` We 're very content , '' suburban Philadelphia couple say despite no power . Central U.S. to remain cold , but next storm unlikely to cause major problems .