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The underground cathedral protecting Tokyo from floods (2018)
An intricate system of dams, levees and tunnels defends the Japan’s capital. Will it be able to cope with climate change?
In the past several decades, the Japanese capital perfected the art of coping with typhonic rains and moody rivers, and its intricate flood defence system is a global wonder. Based on historical rainfall records, the city planning authorities designed Tokyo’s defences to withstand up to 50 millimetres of rain per hour, particularly in areas were people and property are concentrated. Major cities like New York, Shanghai and Bangkok will become increasingly vulnerable to floods and storms as a result of climate change and, like Japan’s capital, most showcase a mix of assessing options and slowly working to set up new defences.
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