Cities are confronting two defining challenges of our century: accelerating climate breakdown and widening health inequities. In 2024 alone, record-setting heatwaves closed schools from Mexico City to Manila, coastal floods displaced thousands across the Horn of Africa, and wildfire smoke blanketed entire North American conurbations. These events have reinforced what urban health scholars have long asserted: climate risk is neither evenly distributed nor merely environmental; it is profoundly social and spatial. [...]