LEAH WILLINGHAM and JOHN SEEWER / AP / PBS – Residents of coastal communities in the Northeast slogged through floodwaters for a second day as a powerful nor’easter pummeled the shoreline Sunday, knocking out power to tens of thousands of homes.

Tidal surges swamped low-lying neighborhoods in New Jersey while wind gusts toppled trees on New York’s Long Island, damaging homes and bringing down utility poles …