Venice is struggling to protect its architectural heritage from rising sea levels caused by climate change [1, 2].
The survival of the city is at stake as increasing submersion events threaten the stability of the historic islands. While local authorities have implemented technical solutions to block floodwaters, the long-term viability of these measures remains a point of intense scientific debate.
A recent documentary by ARTE highlights the various solutions implemented by Venetians to combat the consequences of climate disruption [1]. These efforts include the MOSE system, a series of mobile barriers designed to isolate the Venetian lagoon from the Adriatic Sea during high tides. The city, which is approximately 1,600 years old [1], relies on these infrastructures to prevent the frequent flooding that damages its foundations and art.
However, not all experts agree that these barriers provide a permanent solution. Some scientists said that no current adaptation device can fully save the city from the accelerating pace of sea-level rise [2]. This contradiction highlights a gap between the immediate operational success of flood barriers and the long-term geological and climatic reality of the region.
The risk is compounded by the city's unique geography, as it is built on a group of islands within a lagoon [1, 2]. As the water rises, the salt penetrates deeper into the masonry of the buildings, causing structural decay that barriers alone cannot prevent. The tension between the city's desire to remain inhabited and the physical limits of engineering continues to grow as global temperatures rise.
“Venice is struggling to protect its architectural heritage from rising sea levels.”
The conflict between the ARTE documentary and scientific warnings underscores a critical transition for Venice. While the MOSE barriers offer a temporary shield against acute flooding events, they do not address the systemic rise in baseline sea levels. This suggests that Venice may eventually move from a phase of 'flood management' to a phase of 'managed retreat' or total structural transformation if global emissions are not curtailed.
