What's interesting is that you know this. Which means that others should as well. Which means that, I don't know, perhaps modelling what might happen as rains returned, even conducting some tests with tankers full of water could be considered a prudent idea.

In other words, the idea that things could go bad once lots of water came back isn't a far-fetched concept. Yet we are reactionary. We don't seem to spend any time a-priory to try and get ready for such events. History is full of such fuck-ups.