> We've seen this interest in the past in the afterwake of Katrina, and we've been exporting this knowledge for quite some time. Unfortunately, it's probably a

> We've seen this interest in the past in the afterwake of Katrina, and we've been exporting this knowledge for quite some time. Unfortunately, it's probably a difficult problem to solve on the massive scale the US needs. Interestingly, this is a nearly 200 year old problem in America. Most spectacularly in Chicago[1], where the city was barely above the natural water table (Lake Michigan). As the city grew they produced more sewage and the ground was unable to absorb water quickly enough, so water began to backflow into the sewage system. A single Cholera outbreak in these conditions killed 6% of the population. The solution at the time was to just build the sewers above ground, which was obviously a terrible idea. Over 20 years they began raising most of Chicago over 6' into the air. I think this isn't necessary with modern sewage, but in the coming decades we may see stuff like this again for east and west coast cities in the US. It's cheaper to raise entire cities than rebuild them. More energy in the atmosphere means more violent storms, so Southern coastal cities will probably have to move inland. [1]: https://en.wikipedia.org/wiki/Raising_of_Chicago https://en.wikipedia.org/wiki/Raising_of_Chicago