Random weather events of the past: behind Bath railway station there is a footbridge across the River Avon, which at this point has a path alongside it. Under the bridge you can see the levels of past floods marked. The river here is heavily canalised with high banks. The first one marked was January 1866 (presumably the canalisation didn't happen much before this) and from then to 31st December 1900 there are 11 floods recorded, including November 1894 which has still to be surpassed. From 1901 onwards, only four are marked, and none since 1960. I conclude (possibly spuriously) that in this location at least, improved flood controls and drainage trump rainfall.