Acqua alta and tides in Venice
The so-called high water in Venice (acqua alta) is a phenomenon that interests the city of Venice several days a year. Acqua alta means the flooding of some of Venetian streets, due to the natural rise of the water tide combined with other causes.
If the tide is a natural event, caused by astronomical phenomena (mostly by the Moon phases), the high water in Venice is caused the combination of natural high tide with scirocco wind and sometimes heavy rain.
Global warming, causing the rise of waters and seas, is considered to have worsened the high water in Venice – namely, more days of flooding in a year and higher floodings.
Information and up-to-date forecast of the high water in Venice can be found on the website of the public Tide Centre (Centro Previsioni e segnalazioni maree).