This national analysis identifies when hundreds of US coastal communities will face chronic inundation and possible retreat as sea levels rise. It also includes information about the number of homes at risk, which draws from the companion analysis, Underwater: Rising Seas, Chronic Floods, and the Implications for US Coastal Real Estate (2018). You can explore these communities—and discover the consequences of rising seas—by clicking through the series of maps and pages included here. – The Union of Concerned Scientists