No, the problem is ventilation. https://en.wikipedia.org/wiki/London_Underground_cooling https://en.wikipedia.org/wiki/London_Underground_cooling In eastern eu

No, the problem is ventilation. https://en.wikipedia.org/wiki/London_Underground_cooling https://en.wikipedia.org/wiki/London_Underground_cooling In eastern europe we have very effective ventilation - for number of reasons, one of them is that it was built much later, the other is that some of the station were built to serve as a nuclear shelter so they had to have very safe ventilation systems...