Vltava's frozen over. Not all the way across, but a friend claims he was walking on it yesterday. With his friend on the shore with a mobile phone at the ready in case he fell in.

Meanwhile, I forgot to turn off the water leading to the faucet on my balcony. The pipes appear to have broken and issued forth in a vodopad into the apartment below. The flow is now stanched, but perhaps only because it froze. Bad, bad, bad.