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Already today, there are more and more heat waves, which are a burden for people living in cities. Older people in particular suffer, and for some it has life-threatening consequences. Against the background of climate change and forecasts that two thirds of the world’s population will live in cities by 2050, the urban climate is a current and relevant topic. Paris is one of the most severely affected cities in Europe. Summer nights here are up to 4 K warmer than in the surrounding countryside. During the heat waves in the summer of 2022, Paris was hit particularly hard by the heat, but…