Whether it's called 'high-tide' flooding, 'sunny day,' or 'nuisance' flooding, the problem is getting worse in many coastal communities. As the warming climate melts glaciers and polar ice, sea levels are rising at rates even experts are having a hard time predicting. Tides are running generally higher as a result, and high-tide flooding is happening more and more. Seawater regularly invades low-lying cities like Miami and Charleston, South Carolina, and bubbles up through shoreline storm drains during full and new moon cycles when tides are even higher. Weather events from hurricanes to heavy rains and climate phenomena such as El Niño can make the situation worse. “If the average tide is higher – you will get more flooding,” says Lab's Robert Kopp, director of the Rutgers University Institute of Earth, Ocean and Atmospheric Sciences.