The book addresses the contributions of urban geometry under hot-humid climate in the Melaka Town, Malaysia, and their benefits toward optimum cooling effect of water body modification. The aim is to examine quantitatively the potential of the cooling effect from water bodies in combination of street geometries and the development of comfortable microclimate conditions at street level in the city environment. Main methodology phase through computer simulation was developed. ENVI-met microclimate model was used to predict the impact of modification according to the proposed hypothetical urban geometries investigated include various street aspect ratio equal to 1, >1, and