Pictures on social media showed a city ferry, water taxis and gondolas — another kind of boat — grounded on walkways. At least 60 boats were damaged in the flooding, civil protection officials said. Flooding in Venice during the northern autumn season is a normal and expected occurrence, but high tide data from recent years shows the fingerprints of rising sea levels.St. Mark’s Square at the city center has gone from flooding four times a year in 1900 to over 60 times annually in recent years.
