The 2nd European Workshop of the LIFE ASTI project was held on 14 October 2020, with the participation of more than 170 individuals representing universities and research institutes, local authorities, non-governmental organisations and private companies from 10 countries. The purpose of the Workshop was the scientific discussion for highlighting the problem of the Urban Heat Island (UHI) and its consequences for human health. The Workshop was held online, to protect participants from the COVID-19 pandemic and to prevent the spread of the virus. Sympraxis Team is a partner of the project and collaborates with the other partners to achieve its goals. These partners are the Azienda Sanitaria Locale Roma 1, the Geospatial Enabling Technologies Ltd., the Institute of Atmospheric Sciences and Climate-National Research Council of Italy, the Municipality of Thessaloniki, as well as the coordinating partner, the Aristotle University of Thessaloniki (School of Physics / Department of Applied and Environmental Physics).