As UNESCO world heritage city shaped by the role of water, the city of Bruges is also particularly vulnerable to water risks and calls for a holistic and preventative approach optimising the green-blue strategic management. Acknowledging the inner canals are vital to make the city climate change resilient, the Blue4Green project aims at improving the quality and quantity of water supply to mitigate flood, drought and water stress risks. This EUI-IA project uses technological innovations to monitor and correct green and blue water flows in the cities, safeguarding Bruges’ world heritage city, and keeping the city and its residents cool in hot summers. We are involved to analyse historical satellite data on health status of trees, and to monitor tree health and water status over summer using thermal and multispectral drone imagery.