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		michaelbuckbee on Aug 11, 2021 \| parent \| context \| favorite \| on: The emergence of heat and humidity too severe for ... This reminds me of how the London Underground used to be much cooler, but the trains have raised the temperature of the clay surrounding the tunnels sufficiently that it never cools off: https://en.wikipedia.org/wiki/London_Underground_cooling

mastax on Aug 11, 2021 [–]

Relevant: https://youtu.be/Y8RfeAmLfn8

There's also all the body heat, and the resistive braking of the trains which is being phased out.

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