I don't mean tomorrow. What I mean is, if Putin is detonating dams then we know he's running out of conventional options. If pressure starts to build on him...
This is turning into the sort of scenario where I would tell you someone might actually use one. First use by a democratic regime more or less guarantees removal from office. Bilateral mutually assured destruction seems to work, mad as it is. The disaster scenario is an authoritarian regime under pressure both from within and without facing an opponent armed only with conventional forces. First use probably leads to a coup, but that's not a certainty. If you're in that box and you know a coup is coming anyway, why not? What's the worst that can happen? They kill you for treason either way if the coup succeeds, so why not do absolutely anything to try and stop it?