Alongside escapees of political persecution.

This is already happening.

What will we do with Disney World?! They can't just up and move!

My family have had one home leveled, one home so badly damaged that after rehab, lost 2/3 of its value, and yet another home badly damaged by three separate climate driven events. One was a 1000 yr flood, and then, two different straight wind derechos. We were homeless three times.
We live in the Midwest. Furthermore, we are only one of many thousands that have already been affected and are certainly not the first. When the insurance companies pass on the profits because of risk, we can accept that actuaries have seen the light.