This picture, not exactly the best in the world, I took at the weekend when the river Tiber rose to its highest level in 40 years. The bridge in the distance gives some indication of how high it got - normally one can see most of the supports of the bridge.
Another fascinating aspect of this was the impulse of the Romans to take their passaggiata to see the spectacle and enjoy it. When something dramatic happens here, they all gather round, making it feel like a family event. There were streams of people, young and old, groups, couples and individuals, going to and fro to observe and record the river. I suppose it happens all over the world, but there is something distinctive in the festive manner in which they do these things here.