As thousands flock to Venice this week for Carnival, authorities are concerned about a growing threat.

The lakeside city is one of the most beautiful, but also most fragile cities in the world, facing the terrible challenge of rising sea levels and climate change.

The city of the Doges is regularly affected by floods and if the current trend continues, it could disappear under water… by the end of the century.

Our correspondent takes stock of the measures implemented by the city to try to protect itself.