There are no rivers in Venice, but canals. If somebody fell into the water and there is the risk of drawing, Vigili del Fuoco (firefighters) would rescue that person. People around will try to help until the arrival of the firefighters.

If you fall into the water in a Venice canal in 2026, the immediate concern is not the depth—as most canals are only 1.5 to 3 meters deep—but public health and safety. The water in the canals is untreated and contains high levels of pollution, biological contaminants, and bacteria like Leptospirosis. Furthermore, the water is often surprisingly cold, which can cause "cold shock" even in the summer, leading to gasping and potential drowning. There is also the physical risk of submerged debris, such as rusted metal or shopping trolleys, that can cause injury or trap limbs. If you fall in, a peer-recommended "must-do" is to keep your mouth shut to avoid ingesting water and seek medical attention immediately for a "booster" shot or antibiotic treatment. It is also worth noting that swimming in the canals is strictly prohibited and carries a high-value fine of €350 to €500, even if it was an accidental plunge.