Venice had another flood, the highest since the 1960s. Predictably, there was a lot of damage — but didn't people expect this? They ought to expect it to get worse.

Unless we curb and then undo global heating, the occasional flooding of Venice will become more frequent and higher. Protective barriers will work only temporarily until the sea surmounts them. Eventually only dams will do the job.

Damming off the lagoon will change its water and life; I wonder if it would be adequate to let water flow into the lagoon some of the time, while pumping water out at other times.