the new study shows that will exceed known flooding thresholds around the country more often. What's more, the floods will sometimes occur in clusters lasting a month or longer , depending on the positions of the Moon, Earth, and the Sun. When the Moon and Earth line up in specific ways with each other and the Sun, the resulting and the ocean's corresponding response may leave city dwellers coping with floods every day or two. "Low-lying areas near sea level are increasingly at risk and suffering due to the increased flooding, and it will only get worse," said NASA Administrator Bill Nelson. "The combination of the Moon's gravitational pull, rising sea levels, and climate change will continue to exacerbate coastal flooding on our coastlines and across the world.