Updated at 2:55 p.m. ET
"Venice is on its knees," Mayor Luigi Brugnaro says as the lagoon city suffers through some of the worst flooding in its history. The highest tide in 50 years has brought seawater that is threatening monuments and works of art in the historic city.
With more than 85 percent of the city flooded, Brugnaro says the city is in a state of emergency and that he has asked Italy's government for help.