Comment by seanmcdirmid

Tokyo and much of Japan have huge expensive drainage systems to prevent their cities from flooding during the storms they have. China is in the same region and doesn’t have that infrastructure yet, so you’ll still see cities like Wuhan flood every few years. It’s a good bet that China will eventually invest in these systems like Japan has, as it matches their development model fairly well.

I’m not sure how Florida or Louisiana would deal with flooding though, they simply have nowhere for the water to go. They would have to basically pump and store it above ground somehow. It might make sense to re-level their cities with an artificial ground level a few stories above sea level.