水来自于雨水和雪，储藏在地下水箱。
Water is collected from rain or snowfall and stored in large underground cisterns.
同时地下水箱可以贮存170万升的雨水用于空调和其他设备。
And an underground tank can store one million seven hundred thousand liters of rainwater for air conditioning and other systems.
典型的解决方法是建造更大直径的排水管和巨大的地下水箱来容纳过量的来水，直至下水管网能够自行处理水流。
The typical solution is for a city to build larger pipes and a giant underground tank to hold the excess water until sewers can handle the flow.
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