Cities increasingly face negative effects of climate change and try to adapt. But their adaptation strategies often do not work out as planned because citizens and stakeholders are not sufficiently involved in developing these. The CICADA4CE project helps city authorities to design effective climate change policies based on the concept of ecosystem- and community-based adaptation. The partners co-create action plans with citizens and other stakeholders in urban living labs in five pilot cities. To ensure active participation and collective action the partners also train all stakeholders on climate change adaptation processes.