NPR

NYC's Subway Flooding Isn't A Fluke. It's The Reality For Cities In A Warming World

Underground trains are incredibly susceptible to flooding from climate-driven extreme rain and sea level rise. Cities around the world are racing to adapt their transit systems.
Rescuers carried a boat into the subway in Zhengzhou, China in July after flash floods trapped passengers underground.

Global warming is driving dangerous and disruptive flooding in underground rail systems around the world. Flooded tunnels and stations have disrupted service and stranded passengers in Boston, London, Washington, D.C., San Francisco, Barcelona, Taipei, Bangkok and a host of other cities in recent years.

But the problem has taken on added urgency this summer, with multiple, high-profile subway floods driven by summer rain storms.

Overnight, the remnants of Hurricane Ida flooded much of the New York City subway. Mayor Bill de Blasio issued a travel ban and warned residents to "stay off subways", as up to 10 inches of rain fell in some parts of the region in a matter of hours.

This is the third time New York's subways have flooded this summer, and the first time the National Weather Service issued a flash flood emergency warning for the city..

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