Do I remember it? We were in it! It was before the Arno burst its banks and drowned Florence, but it had been raining hard and continuously for many days. Having "done" Firenze, we were driving south at 6:00 A.M., out of Sienna, headed for Rome to rendezvous with our friend. The autostrada was not completed, so we were on the local road, cutting through the hillsides. The road went down the hillside, made a hairpin bend, and cut up the other side of the ridge. I slowed for the curve but didn't realize it was under several inches of...