Floodwaters marooned vehicles on streets and poured into subway stations, disrupting the journeys of millions of commuters. Mohammed Doha, a 52-year-old construction worker who lives in a ground-level, two-bedroom apartment in The Hole, a low-lying wedge of blocks on the border between Brooklyn and Queens, splashed through his kitchen in sandals. “If they would have a proper drainage system like the other areas of the city, then we wouldn’t have this problem,” he said. “We are really, really suffering.”