Meh, I was thinking of a giant ice cube. 😬

Tl;dw: Replacing pavement with green space (vegetation), trees for shade, and painting pavement and rooftops with lighter colors to reflect heat.

All, in my opinion, relatively simple to implement compared to the potential increase in livability. A sea of pavement is depressing enough even before the heat illness and deaths

Whatever became of that magic cooling paint that fluoresces sunlight into infrared?