Comment by dubcanada
Are you suggesting that flood prevention only happens in higher income neighbourhoods? Flood prevention tends to lie on the county engineers. Not so much private individuals to dictate. Doesn't matter how much money you have, you can't just dig up a road to put in proper flood prevention measures like drainage and grade.
The Army Corps of Engineers also does a lot of flood management work, and they use a cost/benefit analysis when deciding which projects to approve that takes into account the value of the real estate being protected. And even then, the local community has to put up a large share of the funding. So it definitely ends up favoring richer communities.
99 Percent Invisible did an episode about this recently:
https://99percentinvisible.org/episode/nbft-05-the-little-le...