I live in the Keys (Summerland Key), so I think I have some skin the the game here. These is not and climate change exodus happening there is a real economic issue in the keys with workforce affordability, the average rent in the keys sits very near the average rent for San Francisco. A decent home for rent will run you between $3500 to $4000 a month. Meanwhile the average non-skilled job pays about $10 an hour in the keys. This has been going on long before Irma hit us. Irma exacerbated the problem by destroying most of the ground level homes built before 1979 as well as Mobile homes and RV's. The exact homes that where the most affordable to the workforce. These people are leaving due to economics not because Irma was somehow a freak of climate change.
Article on work force housing issue and how Irma made it worse:
https://therealdeal.com/miami/2019/07/21/many-residents-of-t...
I have lived in Florida for 44 years and have seen storms far nastier than Irma long before climate change was a thing. It's the nature of the beast here, and homes can and are being built to withstand these storms. They do a lot of damage, but they are not these cyclones of death that the media makes them out to be. At CAT 4 or 5 storm is a serious storm don't get me wrong. I took a lot of damage from Irma due to a roof hatch failing, but it was all water damage, structurally my house is fine. But it also sits 9 foot above sea level as far as ground and then 14 foot pier foundation above that. Storm surge here can be up to 15 ft. If you are not above that your house is going to flood in a serious storm. If you are above that, and your house is built to code, it is going to survive the storm. If you are ground level, anywhere on the islands other than by the cemetery in Key west, which IIRC is 15 to 20 ft above sea level, you are going to flood.
Take a look at the 1935 Labor day storm that hit us, look at the devastation, compare it to Irma and you will see that these storms come and go, The 1935 storm was the worst storm to have ever have made landfall.
https://en.wikipedia.org/wiki/1935_Labor_Day_hurricane
It was horrific, my grandparents and great grandparents went thru it, all of them said they would never live to see another one like it, and they where correct.
I wish people would focus more on ocean pollution and preservation, I have seen the decline in ocean stock first hand in my life. Killing the ocean is what is going to kill us, and it has to do directly with what we are pumping into the water.
Edit: Forgot to note outside of commercial shellfish, fishing and fishing guide occupations there is no industry down here other than the service industry.