What can cities do to survive extreme heat? The best answer in my opinion that is unlikely to happen would be to modify building codes and standardize 3D print

What can cities do to survive extreme heat? The best answer in my opinion that is unlikely to happen would be to modify building codes and standardize 3D printed modules that can be easily and quickly be put under-ground. An old example of this is Coober Pedy in Austrailia. [1] They have extreme heat but do all their working and living under ground where the temperature is constantly low all year long. 3D printed modules could be designed to be water/air tight, made from recycled materials, and in many cases entirely carbon neutral. Individuals have already been doing this for some time manually with great success. There are thousands of examples on youtube of such implementations. Standardize this, make it super easy to implement, make all plumbing and wiring standardized world wide and this could make homes affordable to many more people. Make it modular so people could upgrade room by room as required. Use crane hooks so that a large excavator could easily life out any individual room. Seal the home in something that is easy to remove but acts like an earth insulator. It does not get greener or more carbon neutral than this. Most air conditioners would be a thing of the past and heating can be done through solar, solar inductive, convection, heat battery walls, etc... This would also free up tremendous power capacity on the grid for EV's. [1] - https://www.businessinsider.com/inside-coober-pedy-australias-underground-town-2016-1 https://www.businessinsider.com/inside-coober-pedy-australia...