
Not before time. With the seas rising, many coastal areas around the globe are likely to be flooded. In the future, the water is not expected to recede with the annual tide as it does now.
Once completed, 78 mobile flood barriers in Venice will be raised from the seabed to shut off the lagoon in the event of rising sea levels and winter storms. The city suffers flooding on a yearly basis. In 1966, 80% of the city was flooded by high tides.

The city of Venice is sited on one of a group of 118 small islands in northeastern Italy separated by canals and linked by bridges. I've seen historical paintings and sketches of the place, often displayed in English grand homes, but never realized Venice was on such a small island.

I've got a sinking feeling.
Twenty five years ago, I lived on the Gold Coast of Queensland in Australia. Wealthy people live either side of canals separating the strip of coastal land. Back then, my family discussed the possibility of the entire area being covered by sea in some possible future.
The Thames Barrier prevents tidal surges from reaching London. The marshlands along the coast soak up excess water too. I live in one of the highest parts, north-east of the city, one hill away from Arkley View. In World War II, the large house, a "Y" station on the outskirts of Barnet, acted as a data collection centre at which traffic was collated and passed to Bletchley Park during air raids.
The peril facing the world is different now.
What choice do people living in threatened coastal areas have? They can't leave their home because of a possibility. If everyone decided to sell, their land would lose value. People with youngsters should think of the future. On the other hand, maybe it's best not to be prudent. Enjoy whatever life offers. As for me, I'd wait. But I've lived a full life.
What would you do?