One idea likely to be both controversial and expensive: demolishing properties and returning developed areas back to nature.

Mainland Miami ponders returning neighborhoods to nature in order to survive rising seas http://www.miamiherald.com/news/local/community/miami-dade/article155213369.html

• B-Roll: Miami Sea Level Flooding https://www.youtube.com/watch?v=A4DIkVDIDS0
• Sea level rise Key West https://twitter.com/ed_hawkins/status/872749253185220608
• The Perfect Tide: Sea Level and the Future of South Florida https://www.youtube.com/watch?v=qRGuQKv4gPU
• U.S. GDP by State https://www.bea.gov/iTable/drilldown.cfm?reqid=70&stepnum=11&AreaTypeKeyGdp=1&GeoFipsGdp=XX&ClassKeyGdp=naics&ComponentKey=200&IndustryKey=1&YearGdp=2016&YearGdpBegin=-1&YearGdpEnd=-1&UnitOfMeasureKeyGdp=levels&RankKeyGdp=1&Drill=1&nRange=5
• Sound effects http://Soundmorph.com
• Expert explains Future Sea Level Rise (2017) https://www.youtube.com/watch?v=AAPPq43iRLs
• Teaser image Key West via Wikipedia