“Sinking is NOT ‘global warming’...
https://www.thesun.co.uk/news/7620018/venice-floods-sinking-defences-pictures/
Scientists tracked the elevation of Venice and its surrounding lagoons over a ten year period and have said that on average, the city is sinking up to two millimetres every year.
It’s thought the subsidence is due to plate tectonics as the Adriatic plate, on which Venice sits, is subducting beneath the Apennines Mountains and causing the city and its environs to drop slightly in elevation.
Same thing is happening to the Atlantic coast.