To prepare for the increase in frequency and intensity of heat waves, cities are increasingly taking into account the impact on thermal comfort when redesigning public spaces. Specifically, when redesigning streets, squares,... measures such as shading by trees and cooling by water elements are taken into account to mitigate heat stress. The project monitors redevelopment projects in 4 Flemish cities. We organize measurement campaigns before and after the redevelopment and examine to what extent we can quantify the impact of the design on heat stress. This project is carried out in consultation with the cities involved.