6-inch floods on the second-floor balcony at work. By standing in the middle of it and clearing the drain that had been artistically converted by filling it with pebbles and earth.
I'm not sure if being the only person in the office in walking boots was a plus or a minus.
Probably a good thing I had a spare shirt, anyway.
ETA Unfortunately the damp-course around the balcony was significantly below the water level, so we've had flooding under the raised floor in that corner of the office, necessitating a rather rapid shutdown of computer systems until we could tell whether the electrics were affected.
We were saved from worse problems by a hole in the floor; this meant that the water all drained into the soft ceiling of the office below, flooding them throughout their office instead.
Oh and HSK tube and the circle line are flooded out.