London Tube Carriages Can Be 5C Hotter Than Street in Heat Wave

For London commuters squished into cramped carriages, faces against sweaty armpits, every day is a heat wave, and every heat wave is an inferno.

Unusually hot weather is making it almost unbearable to travel on the UK capital’s underground train network. As pedestrians bake in 30C heat at street level, seeking shade among the wilting roadside trees, temperatures inside some tube carriages can be nearly 5C hotter.