I actually though you would come up with a vodník-related pianist pun :) Yes, they do drink beer of course, here's even a classical fairytale Vodník v pivovaře, A Vodník in a Brewery :))

Regarding floods, we've learnt our lesson. In 2002, Prague experienced likely the worst flood in its history. We call it a millenial flood, as such disaster occurs only once in like a thousand years. Few hours before the tidal wave, then Mayor of Prague stood at the bank, calming people down: "The situation is exceedingly excellent!"

He became a legend in a way. This flood, and several others, and we've learnt how to behave, and that we should care more about hydrology. Kinda what the Spaniards shoud take away from the recent flood, with all respect to affected people.