Climate
Jack Klein takes heat readings, gives fans to overheated passengers and lugs big jugs of water into the stations
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Global — Oliver Milman in New York, with photos and video by Thalia Juarez
Jack Klein takes heat readings, gives fans to overheated passengers and lugs big jugs of water into the stations
On a recent August day in the subterranean furnace of New York City’s subway, one bearded, curly haired man was studying his phone for different reasons than the other wilting passengers – to track the soaring temperatures and ponder how underground train stations can cool down in an era of climate crisis.
Jack Klein, a 31-year-old construction site manager, has in the past two years taken it upon himself to become a sort of guerrilla subway heat operative, sticking teardrop-shaped thermometers to steel beams in seven of the hottest Manhattan stations and posting social media videos of the hades-like summer temperatures that commuters have to endure.
On a recent August day in the subterranean furnace of New York City’s subway, one bearded, curly haired man was studying his phone for different reasons than the other wilting passengers – to track the soaring temperatures and ponder how underground train stations can cool down in an era of climate crisis.
This report is published with credit to The Guardian. The wire sent a summary; open the original for any extra context. Read on The Guardian →
Source: The Guardian · Oliver Milman in New York, with photos and video by Thalia Juarez. Published 26 Aug 2026, 10:00 am.
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