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NYC's Underground Sauna: A New Plan to Beat the Heat
26 Aug
Summary
- NYC subway stations are becoming underground saunas due to climate change.
- A new study will explore capturing station heat to warm buildings.
- This thermal energy network concept could be a national first.

New York City's subway stations are becoming dangerously hot, with temperatures in underground areas frequently exceeding those above ground, exacerbated by climate change. One individual has been documenting these extreme conditions, highlighting the discomfort and potential health risks for commuters and staff.
To combat this growing issue, New York is investigating a pioneering thermal energy network. This proposed system would capture heat from subway stations and channel it deep underground for storage. In colder months, this stored heat could then be utilized to warm municipal buildings, such as City Hall.
The study will initially focus on the Brooklyn Bridge-City Hall and Chambers Street stations, identified as particularly hot spots. This innovative approach, drawing inspiration from ancient Roman and Persian cooling methods, aims to reduce platform temperatures and create a more resilient, energy-efficient transit system.
While experts see a feasible path to cooling stations globally using similar methods, the implementation in New York's extensive century-old system will require billions of dollars and many years. Interim measures may be necessary for the millions of daily commuters who continue to face sweltering conditions.