There is nuisance flooding, which is definitely up already in many parts of the world, and then there is the kind of flooding that essentially makes it impossible to live in certain places. My own country (NL) has been working since a bad flood in 1953 to raise the various flood protection systems to account for rarer events and the mechanisms put in place have already been triggered several times. Right now they're working on raising the whole protection level another meter (three feet), and if necessary they'll do more than that but there are some complicating factors. At some point the rivers won't empty any more and you end up with either reverse flow or internal flooding simply because that river water has nowhere to go to.
For instance, Vanatu:
https://climateknowledgeportal.worldbank.org/sites/default/f...
There is nuisance flooding, which is definitely up already in many parts of the world, and then there is the kind of flooding that essentially makes it impossible to live in certain places. My own country (NL) has been working since a bad flood in 1953 to raise the various flood protection systems to account for rarer events and the mechanisms put in place have already been triggered several times. Right now they're working on raising the whole protection level another meter (three feet), and if necessary they'll do more than that but there are some complicating factors. At some point the rivers won't empty any more and you end up with either reverse flow or internal flooding simply because that river water has nowhere to go to.