The catalogue contains 86 strategies and measures for mitigating the UHI effect and/or for improving OTC. These are grouped into seven clusters: vegetation, urban geometry, water features and bodies, materials and surfaces, shading, transport, and energy. These clusters are based on strategic sectors, for example urban geometry, transport and energy, and the physical aspects, such as albedo, shading and ventilation, which influence the urban climate. Each strategy describes its impact towards UHI and OTC, its applicability in the tropical context of Singapore, its integration into urban planning, and its current research status. While many of the items in the catalogue may also be applicable to non-tropical cities, mitigation strategies and measures that are not applicable to tropical cities have been excluded.