How high is the flood risk for Saúl Luciano Lliuya’s house in the Peruvian Andes? Has it increased due to climate change? If so, does the German electricity company RWE, whose coal emissions contribute to global warming, have to bear part of the costs of protecting the house? This is the subject in Lliuya’s landmark lawsuit against RWE before the Hamm Higher Regional Court (OLG), which will continue to be heard next Monday and Wednesday.