日益多变的气候引发更多暴雨洪灾，可我们的排水系统是维多利亚时代设计的，很难应付骤然来临的水流。
An increasingly volatile climate has led to more torrential rainstorms, but we have a drainage system, designed in Victorian times, that finds it difficult to cope with sudden rushes of water.
这种现象并不仅仅出现在纽约，在美国有将近800个城市依靠破旧的排水系统，使用同一个管道来收集暴雨径流水，工业废水和人用污水。
And New York is not alone. Nearly 800 American cities rely on decrepit systems that collect storm-water run-off, industrial waste and human sewage in the same pipes.
增加了的降水量超过排水系统的负荷。过去10年间，暴雨常引发下水道溢流。
Sewer systems weren't built to handle all that water. The last 10 years have seen more severe storms causing sewer overflows.
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