The LIFE ASTI project, with Sympraxis Team as a key partner, aims to lead to a substantial contribution to the overall aim of the EU Climate Adaptation Strategy by developing policies for a better adaptation to Urban Heat Island effect (UHI) impacts, especially during summer heat waves, by introducing heat prevention services and better implementation of energy efficiency guidelines in European cities. During the first half of its implementation period, a number of  reports have been published reflecting the expected results and a number of communication deliverables. Moreover, the new LIFE ASTI tool has been created, a mobile application which provides easy access to the information produced by the LIFE ASTI forecasting system for Rome, Thessaloniki and Heraklion, where an estimation of the thermal stress is provided for the different districts of the cities. Download the app at https://app.lifeasti.eu/.