Way Off facts · 🏙️ Cities
How many litres of water does the London Underground pump out of its tunnels every day just to stop them flooding?
30 million
litres per day
30,000,000 exactly, give or take
The Tube quietly pumps out around 30 million litres of water every day — an Olympic swimming pool's worth every two hours, forever, or London drowns its own railway.SOURCETransport for London
Scale check: 30 million is roughly all of Greater London.
Would you have guessed? You'll be way off.
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