Cities, home to more than half of the world's population and important economic hubs, are vulnerable to climate change and worthy to protect. To address these challenges, implementing adaptation measures is inevitable. The paper provides insights into climate change related risks, opportunities and adaptation actions based on responses by 40 European cities to the 2014 CDP Cities Information Request. The analysis shows that 92.5% of the responding European cities report that they face physical risks arising from climate change and that they identify more intense rainfall as the most relevant physical risk. Furthermore, more than half of the participants indicate that they are facing social risks due to climate change with increased risk to already vulnerable populations being the most important one. However, 72.5% of the cities report that they see economic opportunities arising from climate change. Already, 55% of the observed European cities indicate that they have implemented adaptation action plans and 82.5% of all cities are putting adaptation action into practice. City governments show great awareness, interest and knowledge in addressing climate change issues, yet there is still demand for information and guidance. Moreover, the variety of answers shows that there is no "one-size fits all solution" for cities to adapt to climate change. Thus, the findings can also serve as an innovative starting point for further research as well as the practical implementation of adaptation measures.