John Garrisi, left, and Gaige Graf move an outdoor table away from the shorefront during the early stages of a nor’easter storm on Friday. Robert F. Bukaty/AP hide caption toggle caption Robert F. Bukaty/AP Talia Manno opened her door on Saturday morning to waves lapping halfway up the front steps to her Atlantic City, N.J., home. “It got up to my fifth step,” Manno said. “I was really freaking out.” Manno, a lifelong resident, said the last time water came that high was during Hurricane Sandy. “Even if you live here and you see high tide and flooding, that was really scary and it happened so fast,” she said. Manno is among tens of millions of people from the mid-Atlantic through the coast of Maine who are in the path of a powerful and rare September nor’easter that is bringing coastal flooding, heavy rain and high winds this weekend. Nearly 80,000 people were without power across New Jersey, New York, Pennsylvania, Connecticut and Massachusetts, as of Saturday evening, according to the PowerOutage.com map. The storm …