STORY: At 2ft 11in (89cm), the high tide at 07:30 a.m.(0630 GMT) was enough to activate the Mose flood barriers, which protect the fragile city from flooding during the so-called "acqua alta" or high water.
The new glass barriers installed in the square protected the interior of the historic basilica that in 2019 was badly damaged after a high tide peaked at 6ft 2in (187cm). The record height of 6ft 4in (194cm) was set in 1966.
Walkways were set up for tourists and local residents to cross St. Mark's Square without getting their feet wet.
Venice’s floods are caused by a combination of factors exacerbated by climate change - from rising sea levels and unusually high tides to land subsidence that has caused the ground level of the city to sink.