States At Risk: America’s Preparedness Report Card. Special Report Prepared by Climate Central and ICF International.
You can download a 14-page National Summary at this site. It provides clearer details about which states are doing well and which are not.
Update: Florida is especially vulnerable and ill-prepared. See this article in Emergency Management magazine: Florida Flood Preparations Slammed in National Report. “A study, called States at Risk, says Florida lacks a long-term plan for dealing with rising sea levels, despite being the nation’s most vulnerable state as oceans inch higher.”