Fair about the dam. If that happened in the West then yes, it'd change things. The biggest dam failures in North America for example have never been that big. A

Fair about the dam. If that happened in the West then yes, it'd change things. The biggest dam failures in North America for example have never been that big. And you'd surely never get a major new dam built today anywhere near any kind of populated area in the USA. Also, it's worth noting that nuclear disasters remain dangerous for amounts of time ranging from "one generation" to "longer than human history so far", adding an extra element of catastrophe.