An Associated Press report details how the Florida Keys are starting to prepare for seasonal flooding and rising water levels overall. "A tidal gauge operating since before the Civil War has documented a sea level rise of 9 inches in the last century, and officials expect that to double over the next 50 years." Flooding used to be a much rarer occurrence, but now many businesses are finding it necessary to have plans in place to deal with it. "The Keys and three South Florida counties agreed in 2010 to collaborate on a regional plan to adapt to climate change. The first action plan developed under that agreement was published in October and calls for revamped planning policies, more public transportation options, stopping seawater from flowing into freshwater supplies and managing the region's unique ecosystems so that they can adapt, too." The Keys are one of many places beginning to seriously evaluate their options for dealing with flooding after witnessing the damage caused by Hurricane Sandy.