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www.reuters.com
Just after 5 a.m. on August 30, water began flooding a vast underground chamber called the “cathedral” just north of Tokyo. The gushing water, captured by security cameras, was the rain that was drenching the capital region as Typhoon Shanshan lashed southwest Japan, 600 km (373 miles) away.
The cathedral and its vast network of tunnels did their job: they prevented a vulnerable river basin in the metropolis from flooding. But as global warming causes more severe weather, authorities are having to give the system a major upgrade.
This is fascinating. The level of engineering is impressive and and it is a good response to the changes.