Climate Change: A Climate Migration Pilot Program Could Enhance the Nation's Resilience and Reduce Federal Fiscal Exposure, Report to Congressional Requesters [open pdf - 2MB]
From the Highlights: "According to the 13-agency United States Global Change Research Program, relocation due to climate change will be unavoidable in some coastal areas in all but the very lowest sea level rise projections. One way to reduce the risks to these communities is to improve their climate resilience by planning and preparing for potential hazards related to climate change such as sea level rise. Climate migration--the preemptive movement of people and property away from areas experiencing severe impacts--is one way to improve climate resilience. GAO [Government Accountability Office] was asked to review federal support for climate migration. This report examines (1) the use of climate migration as a resilience strategy; (2) federal support for climate migration; and (3) key challenges to climate migration and how the federal government can address them."
Government Accountability Office: https://www.gao.gov/