Incorrect. Florida is currently undergoing a massive effort to identify resiliency options across the state. There are lots of efforts in the state at the city, county, and state level to address this.
Also, the efforts that I've seen are sub-par at best. Miami wants to build barrier islands that are a few feet above sea level in order to create a basin-type barrier around Brickell (the financial district where Ken Griffin is building a tower). Those are still in the early stages of bureaucratic hell and won't likely be built until it's way too late.