A muted clanking sounded from the door. All of us in the room tensed, thinking the water pressure outside had at last overpowered the sealed door’s capacity to keep it out. But then the clanking came again, rhythmic, like knocking.

“They’re here,” I said. “Get ready.”

The group moved around behind me. I took several breaths then held, and pulled the door open.

A torrent of water gushed in, swinging the door wide and slamming me into everyone in a confused mass of tangled limbs and roaring water and cries of surprise. The room began to fill in no time. We floated upward with it toward the rapidly approaching ceiling.

Once above the door frame, the waters calmed. Then a person burst up from below the surface, wearing goggles and a tank on her back. She popped out her mouthpiece, spraying water. “How many?” she asked.

“Seven,” a woman next to me replied.

The diver handed out Y-shaped breathers. I affixed mine just as my hair brushed the ceiling and water closed over my head. The lights flickered out. By the beam of a flashlight attached to the diver’s harness, I saw her counting heads. Satisfied everyone had their breathers in, she made a ‘follow me’ motion.

We filed after her back down through the door and into the flooded shopping center. Racks of floating shirts tugged against their hangers, like curious cloth creatures. Other divers led more swimmers to our destination, a floor just above the flood waters.

When we climbed out onto dry carpet, I said, “What happened?”

“Levy broke out of nowhere,” our rescuer replied. She began collecting breathers.

“What do we do now?” a man asked.

The diver pointed out toward a balcony. “Wait for rescue.” Then she flipped back into the water and vanished below.