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The sea level in Venice has increased drastically in the last century or so, threatening the very existence of the city. Global warming and the harmful effects of tourism have amplified the phenomenon of acqua alta (sudden rise in sea level), rendering the traditional responses of inhabitants obsolete. It is urgent to act today. Projects conceived in laboratories across the globe are joining forces to save the city. These include RAMSES, a 3D modelization of the lagoon produced using lasers, which analyzes rises in water level; and MOSE, a series of movable dams costing over 4 billion euros, intended to block the sea in case of aqua alta.