The moon is currently in the “tide-amplifying part of its cycle,” according to NASA, but by mid-2030, when this intensified series returns, people living in coastal cities may be dealing with severe floods “every day or two.” Why? This natural yet amplified lunar cycle will be coupled with higher sea levels caused by global warming, triggering a decade of dramatic surges in the number of days with high-tide flooding on nearly all mainland coastlines in the U.S., Hawaii and Guam. High-tide flooding, also known as “nuisance” or “sunny day” floods, is projected to exceed thresholds across the nation more often and occur in clusters that last a month or longer, the NASA Sea Level Change Science Team of the University of Hawaii said. Their study was published last month in the journal Nature Climate Change.