Venice: future underwater access
- Researchers warn Venice is so vulnerable to sea-level rise it may one day require submarines or watercraft for access. - A study suggests parts of Venice could become an underwater attraction within roughly 200 years. - That environmental projection is cited alongside the city's new fiscal controls as context for managing tourism now. (thecooldown.com)
Venice’s long-term climate plan now includes an endpoint few cities ever discuss: parts of the lagoon city could become unreachable except by watercraft. (nature.com) A Scientific Reports study published on April 16, 2026, tested four adaptation paths for Venice over the next 200 years, from today’s mobile flood barriers to ring dikes, a closed lagoon, and eventual retreat. The authors wrote that, under current insufficient emissions cuts, the existing “open lagoon” approach is likely to hit “hard limits” within this century. (nature.com) The study says relocation of monuments inland and abandonment of the city become the only remaining option under extreme sea-level rise in the 22nd century, especially if Antarctic ice-sheet loss accelerates. Venice and its lagoon cover about 550 square kilometers and now receive more than 22 million visitors a year, according to the paper. (nature.com) Sea-level rise is the slow increase of ocean height caused by warming water and melting land ice; in Venice, that combines with land subsidence, or gradual sinking, to raise flood risk faster. The city already depends on the MoSE barrier system, which closes lagoon inlets during high water to keep storm tides out. (nature.com) That long view is colliding with a near-term problem: too many visitors in a fragile city with fewer than 50,000 residents in 2024, down from 170,000 in the early 1950s. Venice’s own access-fee rules say the 2026 system is meant to manage day-trip flows into the historic city on peak days. (nature.com) (comune.venezia.it) For 2026, Venice started charging the access fee on April 3, with the city applying it from 8:30 a.m. to 4 p.m. on selected days through July 26. The municipality says the fee is €5 for people who pay at least four days ahead and €10 for later payment. (comune.venezia.it) (live.comune.venezia.it) The official portal says the charge applies to people entering the ancient city on scheduled days unless they qualify for an exemption, and overnight guests in accommodation in the municipality are among those exempt. The city approved a new regulatory text for the access contribution in September 2025 for application from 2026. (cda.ve.it) (comune.venezia.it) Researchers also spell out the tradeoffs in the bigger engineering options. Ring dikes could isolate Venice from the lagoon, while a permanently closed lagoon would protect against higher seas at the cost of major ecological and social change. (nature.com) The paper says faster greenhouse-gas cuts could still avoid the most disruptive outcomes, even if they do not remove Venice’s exposure to flooding. For now, the city is still reachable by train, road, and boat — but its official tourism controls and its climate science are now being discussed in the same breath. (nature.com) (cda.ve.it)
