Saudi Arabia, of all places. Yea I know they get rain but severe floods?
Speaking to a dancer yesterday he reckoned that the COVID bonus from reduced pollution was the cause. And having thought about it, I see a mechanism. Evaporation goes up as a gas, and will form ice crystals around nucleation sites - which particles of pollution, like PM2.5 eg, serve very effectively. So less pollution, longer up there and bigger deluges when it descends.