Encroaching tides: how sea level rise and tidal flooding threaten U.S. East and Gulf Coast communities over the next 30 years

Flooding during high tides is now common in some places and is projected to grow to the point that sections of coastal cities may flood so often they would become unusable in the near future, according to a report the Union of Concerned Scientists (UCS) released, “Encroaching Tides: How Sea Level Rise and Tidal Flooding Threaten U.S. East and Gulf Coast Communities over the Next 30 Years.” The UCS study is based on an analysis of 52 National Oceanic and Atmospheric Administration (NOAA) tide gauges in communities stretching from Portland, Maine to Freeport, Texas, using moderate sea level rise projections. The analysis reveals that in the next 15 years, most of the towns analyzed could see a tripling in the number of high-tide floods each year and in 30 years a ten-fold increase compared to historic levels.

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