Durch die projizierte globale Erwärmung werden sich Hitzeextreme verschärfen. Vor allem in den Städten wird die Lebensqualität der Stadtbevölkerung unter sommerlichen Hitzewellen leiden. Im Projekt HeatResilientCity werden bewohnerorientierte Hitzeanpassungsmaßnahmen an Gebäuden und im städtischen Freiraum entwickelt und geprüft sowie Empfehlungen für die Umsetzung gegeben.The HeatResilientCity project applied insights from natural sciences, engineering and the social sciences to develop heat adaptation measures, test their effectiveness and partially implement them in two structurally different real-world laboratories in Dresden-Gorbitz and Erfurt-Oststadt. The present article discusses interventions to plant street trees and to refurbish two different residential buildings. We describe and analyse aspects of the implementation process to identify key factors that enable or constrain adaptation action among different groups of actors. We find that adaptation measures that are objectively effective and supported by residents are most appropriate for implementation. Where residents evince scepticism about adaptation measures, information about their effectiveness and usefulness should be disseminated. Early and targeted involvement of relevant stakeholders, careful communication and the establishment of climate adaptation as a permanent interdepartmental task at municipal level can promote successful implementation of heat adaptation measures.

Per capita residential space consumption has been rising continuously for many years. This significantly counteracts the effectiveness of costly energy efficiency measures and programs. This is countered by sufficiency of use concepts, which can contribute to reactivating and increasing the intensity of use of existing properties and avoiding new construction. They represent an important instrument for reducing land consumption and achieving climate neutrality in the building sector. The paper presents results of a research project that investigates the potential of sufficiency concepts for rural and small-town areas. This includes, among other things, survey results on the acceptance of sufficiency measures in the field of housing in a small town in Saxony.

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