Acqua Alta, Venice

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  • Piazza San Marco
    Piazza San Marco
    by nyperose
  • A canal close to Piazza San Marco
    A canal close to Piazza San Marco
    by nyperose
  • Piazza San Marco
    Piazza San Marco
    by nyperose
  • JetlagCity's Profile Photo

    Acqua Alta

    by JetlagCity Written Jun 13, 2004

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    Venetian Lagoon

    Be aware that flooding no longer occurs only in the winter months. Even in June we experienced one evening of "acqua alta" (high water). It was only in Piazza San Marco and its surrounding area, but that's where we were that night so it did affect us. We were going on a moonlit gondola ride and the gondolier had to take a different route than we had planned, because the water was too high for the gondola to get under some of the bridges. Afterwards, we had to try several different routes back to the hotel before we found one not blocked by water. I didn't get a decent picture of the flooding in the dark.

    It was interesting to see for one night, but any more might have been a problem. I suppose we just would've bought boots and gone on...

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  • breughel's Profile Photo

    Aqua Alta also in summer!

    by breughel Updated Mar 9, 2014

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    Aqua alta on terrace of hotel.

    You will have seen how an important part of Venice is covered with water often above 1 m high, with a maximum of 136 cm, in these first days of December 2010.

    Tourists might think that Aqua Alta only happens in the winter. Not necessarily, it can even happen in the summer.
    At end August 1995 we experienced high water 5 -10 cm!
    There had been strong raining for some days and one noon at the time of high tide we saw the water coming out of the pavement at the Piazza San Marco. Some streets were also under water just enough to get wet feet. The terrace of our hotel was under water (photo).
    One expects the water to flow over from the canals but it gushes out of the spaces between the pavings.
    When the tide turned to low all the water went back into the ground.

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  • rexvaughan's Profile Photo

    Bring your boots or wellies!

    by rexvaughan Written Feb 2, 2005

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    As you probably already know, Venice is slowly sinking which makes it suseptible to flooding which happens many times during a year particularly around March and November (but it can happen any season). This creates all sorts of problems for tourists, not to mention the locals. I am sure the moisture makes maintenance of their homes a problem and the city's population has diminished to half what it was 50 years ago.

    When we were eating one night we encountered a family from Louisiana who had been in Interlaken (they pronounced it with a long "a"). They said it was raining so much there that they decided to come to Venice. We left the next morning and found this photo in one of the newspapers. We found it amusing that they had come to avoid the rain, but I am sure they were not amused in the least!

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  • suvanki's Profile Photo

    New warning system from December 2007

    by suvanki Updated Apr 4, 2011

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    Acqua alta poster - info about new warning signals

    From December 7th 2007, a new digital sound transmitter system came into operation, to warn of imminent 'High Water' or Aqua Alta.

    So, first a siren is used to alert everyone of the high tide alarm.

    Next, a signal indicates the expected level of high tide - this signal has between 1 and 4 notes.

    1 long sound (8 seconds) on the same note = 110cm level of high tide

    2 sounds in an upward scale (4 + 8 seconds) = 120cm " " " "

    3 sounds in an upward scale (4+4+8 seconds) = 130cm " " " "

    4 sounds in an upward scale (4+4+4+8 seconds) = 140cm and above

    So, you need to count the sounds, to know the expected level.

    These signals are repeated several times.

    Apparently these alerts can be sent by text message - I was wondering how those with hearing difficulties managed, now I know.

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  • csordila's Profile Photo

    When Venice feel like Atlantis.

    by csordila Updated Jan 3, 2009

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    Aqua alta in Venice 2008
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    When a very high tide combines with low atmospheric pressure and strong scirocco wind, there is the risk of Acqua alta, or "high water" (+ 90 mm above normal high tide.), first of all in the months of October, November, and December.
    This is only a fun if you are prepared with wellies - but sometimes the flood is so high you need thigh-high waders or else you must be prepared to stay indoors until the tide lowers. Fortunately the flooding in Venice is tidal and will go down within 12 hours.
    When there is going to be an exceptionally high tide, a siren is sounded over the whole city in plenty of time to warn you to get to where you need to be.
    The most extreme acqua alta in 22 years, was on December 1, 2008, when the water level reached 156 cm and flooded more than 90% of the city.

    In the near future the global warming may cause a bigger threat by the rising sea level. There are some projects on the way with the intention, to turn the Lagoon into a freshwater lake by closing off it from the sea.

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  • domenicococozza's Profile Photo

    aqua alta

    by domenicococozza Written Jul 22, 2007

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    high water on the grand canal
    1 more image

    When the Adriatic is at high tide or there has been heavy rainfall, Venice suffers from high water levels(aqua alta). Particularly prevalent in the winter months. The lowest parts of Venice get flooded. The locals just don plastic sacks on their feet, held by elastic bands.
    But not to worry - those umbrella vendors appear selling rubber boots instead.

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  • kph100's Profile Photo

    Aqua Alta

    by kph100 Written Jan 21, 2006

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    St Marks square under water
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    On occassions, during winter especially, you will get the Aqua Alta in venice.
    This is where due to the high tide the water rises to the extent of flooding the squares and walk ways. This is more of an issue around the low lying areas such as St Marks square.

    However the local council is very well organised and wooden walkways are erected to enable the people to keep there feet dry.

    One Dec 28th 2005 we took the following pics with a little flooding in St marks Square.

    The website below gives forecast of expected water levels -

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  • Trappatoria a La Bricola new San Marco

    by fingolfin Written Oct 28, 2005

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    They will convince you to eat the fish of the day (8euro/per 100g). Little do you know that they will serve you a 700g fish and you will end up paying 56euros for terrible fish in a diner type of restaurant. Please avoid and please don't be fooled. The food is awful here including the pasta.

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  • Jefie's Profile Photo

    Walking around Piazza San Marco at high tide

    by Jefie Updated Aug 15, 2010

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    Water in front of St. Mark's Basilica
    3 more images

    My friend Lisa happened to be in Venice last December when the city was badly affected by "acqua alta", the term used in Venice to describe partial flooding caused by exceptionally high tides. So I did know about this phenomenon, but I had no idea it was so common for water to accumulate around the Piazza San Marco area. As we were walking around the piazza one evening, we noticed that there was a bit of water in front of the basilica and nothing seemed to be going down the drain. We kept on walking and taking pictures for a while, and when we turned back to leave the piazza, it was almost entirely covered with water! It was only about one inch deep, but even that was too much for the shoes I was wearing so like many other women, I hitched a ride on my husband's back to make it across the puddle. And the funny thing is that when we walked past Piazza San Marco the next day, it was as if nothing had ever happened - the water was gone and there was no trace of the previous night's microflood. I guess it must take much more than a bit of water to prevent Venitians from going about their business!

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  • jelw's Profile Photo

    Aqua Alta -flooding

    by jelw Updated May 18, 2008

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    the flood boardwalks set up

    In certain seasons Venice may become flooded by what is known as Aqua Alta. Please be careful where you walk.
    The waters are known to get pretty dirty, use caution and make sure to wash any flood waters off you with fresh water.
    It is also important to be considerate of the locals and allow them to continue protecting and preserving their property without disruption from the tourists. Many locals want you to stay and enjoy the beauty and shopping Venice affords but they must go about protection first. For more on aqua Alta please see my Intro to Venice.

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  • Polly74's Profile Photo

    Acqua Alta (Rising water)

    by Polly74 Updated Dec 21, 2004

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    In the fall, especially in October and November, it very often happens that the tide rises and the water overflows the banks of the canals, flooding the city: the foundations, the alleyways, the fields, the ground floor of the houses, the churches and the shops. The rising water is a problem for the Venetians but it is an unusual, exciting experience for tourists as it is a unique event. Seeing Piazza San Marco flooded by a still lake of water is most certainly a unique, magical moment, which has been immortalized several times over the years by famous photographers.

    Do not be bewildered by “acqua alta”: you can still visit the city by using the wooden walkways.
    For information, visit the website of the Centro Maree (Tide Forecasts and Reporting Centre) or call 041.2411996.

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  • Maurizioago's Profile Photo

    Acqua alta.

    by Maurizioago Updated Dec 16, 2006

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    Occasionally the water level rises above the level of the squares and streets flooding them. Acqua alta, or high water is likely to happen between late september and april; especially during the months of october, november and december.

    When the city is flooded you can walk on the raised platforms that are placed for that purpose or buy a pair of rubber boots.

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  • suvanki's Profile Photo

    Acqua Alta - Getting around Venice

    by suvanki Written Nov 11, 2011

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    Saint Marks Piazza September 22nd 2009
    4 more images

    Venetians are used to carrying on their lives during times of Aqua Alta (High Water). Although most common between October and early March, It isn't unknown for it to occur at other times.

    Raised platforms (passerelle) (pic 2) are placed at points most affected by the high waters, and are efficiently laid out by special teams of council workers (pic 5)
    When using these, the idea is to keep to the right side of the platform, and keep walking.

    Last Christmas (2010), the waters were especially high, and I endured the platforms along Lista de Spagna, which was quite nerve racking as people trundled along with their suitcases/rucksacks, some stopping to take photos!

    Some hotels will loan out rubber boots, or you can purchase them quite easily - around 11 Euros for plain colours, to upto 50 Euros and above for the funkier designs. Street vendors sell plastic bags to fit over your shoes, but these aren't very useful.

    As San Marco Piazza is one of the lowest parts of the island, it is one of the first places to experience 'flooding' especially around the main doorway of the Basilica (pics 1-3).
    Water seeps up through the Squares pavement first - I've visited in June and September and have seen some flooding here.

    On a plus side, you can take some interesting photos of the reflections of the buildings and lights.

    There are also many places that you can walk and enjoy Venice that aren't affected by the Aqua Alta.

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  • viddra's Profile Photo

    Sinking

    by viddra Written Dec 25, 2005

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    Venice has sunk in the last 100 years, a result of mainland industries pumping water out of the aquiefer below the city. As a consequence, ominously high tides that used to be a minor annoyance, have become a regular winter occurence, particularly in low-lying areas like St Mark's Square.

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  • effeti's Profile Photo

    Floods / High waters (acqua alta) OFFICIAL FAQ

    by effeti Updated Feb 21, 2011

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    After the recent exceptional high waters I heard poor tourists scared by (probably very unprofessional) news coverage.
    Questions like:
    1) I heard of the flood... will be venice still be flooded next month?
    2) I heard vaporetto doesn't work since the last flood 15 days ago, is it true?

    Those are totally stupid questions IF you know more about the "acqua alta".
    So, the municipality set up a Venice high tide FAQ.
    These are the questions that are answered there

    What's "acqua alta" (high water)?
    When does an exceptional tide occur?
    How long does an aqua alta last?
    How often does "acqua alta" occur?
    But how high can high water be?
    Does Venice completely go under water when "acqua alta" occurs?
    How many times in a year can a high water of + 110 cm occur?
    What happens in Venice when there's a high tide?
    How does water rise and fall in Venice?
    What to do in Venice when there is "acqua alta"?

    Follow the link below, learn how it REALLY is, and stop worrying... for a tourist 3 hours of high tide are more a fun than a problem.

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