Le Corbusier’s social housing was meant to be the dream. In a summer of extreme heat, it is a nightmare | Anna Richards

When temperatures get to 40C inside, and French building regulations won’t even allow shutters, these tenants’ listed homes are simply unlivable The population of Firminy, south-east France, has been dwindling for decades. Its recent history is one of factory closures in a region built by steel, and locals tell me that many people leave for better opportunities in neighbouring Saint-Étienne, or to…