In late January 1910, following months of high rainfall, the Seine River flooded the French capital when water pushed upwards from overflowing sewers and subway tunnels, and seeped into basements through fully saturated soil. The waters did not overflow the river's banks within the city, but flooded Paris through tunnels, sewers, and drains. In neighbouring towns both east and west of the capital, the river rose above its banks and flooded the surrounding terrain directly. [More on Wikipedia, via]
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