The growing threat of a rapidly changing climate is undoubtedly one of our cities' most pressing issues. Despite the scientific knowledge about the future impacts of climate change, only a limited number of European cities have established climate adaptation plans. This paucity of political investment can be partially explained by a lack of understanding from both civil society and decision-makers themselves, because the common scientific statements are usually unintelligible and inapplicable for most of the stakeholders. The Climate Twins approach, by linking the future climate of a European city with the current climate of another one, is an innovative approach that can be easily used and understood by non-specialists, providing readily understandable climate information on the impacts of climate change on urban areas and on the existing measures and strategies to cope with such issue. We have reasonably matched seventeen twins from which we can say that the future climate of a city “A” will be significantly similar to the current climate of a city “B”. As an example, we have linked the future climate of Hamburg with the current climate of Toulouse. By linking these current and future climates, this approach allows a better understanding of the forthcoming impacts of a changing climate. Through the comparative analysis of the Climate Twins, we have showed that stakeholders from a city “A” could clearly envision the requirements for a better adaptation to climate change. Moreover, they could get inspired from the current climate-resilient practices promoted in a city “B” and hence, could take those ideas and actions on board for the implementation of a future climate adaptation plan in their own city. As an illustration, we have investigated how and to what extent the city of Hamburg could learn from the city of Toulouse in terms of heat waves management.