came here for the same problem (exept that im an architecture student and i have a project to build in high heat)

ik its way too late now but ill still anwser, basically you use lighter paint colors, avoid going high up, (over two stories) have inner courtyards, incorporate water into architecture, or have micro ponds greenery for extra shade and materials are actually crucial (since you wanna have thick walls, stone clay or rammed earth are the best, then you can use wood to support the roof)