Singapore’s cooling strategy, pioneered by founding prime minister Lee Kuan Yew, has come in for praise in Europe, which is sweltering under a deadly heatwave. Even Tesla founder and world’s first trillionaire Elon Musk has weighed in, calling the late statesman “a genius”. Record-breaking temperatures in countries including Britain, France and Germany have killed dozens, overwhelmed hospitals and led to the closure of schools and cultural sites.