The effects of sea level rise on coastal communities is even more drastic than scientists previously thought -- with more evidence pointing to increases in flooding, even on days without rain, according to the National Oceanic and Atmospheric Administration. High-tide flooding, or "sunny day flooding," is becoming increasingly common due to decades of sea level rise, NOAA said in its update to its sea level rise report released Tuesday. This type of flooding results from the overflow of ocean water at high tide that then covers low-lying areas -- typically occurring when the tides reach anywhere from 1.75 to 2 feet above the daily average, [...]