Aljazeera: Flood protections are easily misunderstood: A 100-year flood is not one that occurs once every 100 years, but instead one that has a 1 percent chance of occurring in a single year. Most U.S. cities have protections for 100-year flood events but some, like Houston, are only prepared for a 50-year flood. But as seas rise and more intense weather events become more frequent, floods are expected to become more destructive. According to a recent study published in the scientific journal Nature Climate...