High Water
The tide in Venice is measured and forecast at the city's historical zero. The cartoons indicate a tide level that can affect the walkable ground of three reference areas.
For example: for Piazza San Marco, one of the lowest points of the city, to begin to flood, a tide above 80 cm is needed. For Rialto, in front of the public transport piers, a height of 105 cm is needed, while in front of the train station, a very high point in the city, 135 cm is needed..