I don't know of any good sources. But my understanding is that there are very few "Methuselah bonds" by which it is meant instruments that have lifespans of 50 years or more. So anybody with a profit motive has no advantage for putting money into something that would have a longer term focus. This explains to me why, for example, banks are still loaning money for buildings on Miami Beach. I would love to understand the dynamics better. It seems to me that only governments can be planning for longer terms. China, maybe?

Dykes are cheap.

I'm assuming you mean "dike" and not "dyke".

Dikes will not protect property in Florida. Our buildings are sitting on top of porous limestone.

oof yes. Dyke is not what i meant.

But florida already has a dike system. Hundreds of miles of them and they work quite well.