Here is a list of all new solutions we need: 1) not insure places at higher risk 2) mass desalinification 3) fix US hot climate grids sparkles and/or place them underground 4) Street corridors to isolate fires in neighborhood 5) Build with more fire-resistant materials 6) Install automated hydrant towers with cameras able to spray water on fire remotely (it's done in Spain on the edge of forests and urban areas) 7) Pass on the costs of maintaining of living in expensive risky areas to the people living there and/or give them benefits to move to unpopulated areas with no risk
1) Not all the world will suffer equally from climate change. The parts that are at higher risk should not be insurable so that new housing will not be built there but somewhere else.
2) The idea there won't be water because it doesn't rain it's ridiculous. We live on a planet literally made of water. We'll develop mass production de-salinification plants and have enough water. We need to keep investing and improving that technology. I think having water artifically priced at a low price won't help the development of the desalinification industry. So water should cost more NOW that we can afford it to reflect the R&D cost of it that we must make to have water later.
5) Hot countries don't tend to have plenty of wood to build with. Forests grow with more rain. Building with wood in Spain and Italy is very rare. LA got his wood shipped from somewhere further out. Let's build with other materials in arid fire-prone zones. Yes it's perfectly possible to have houses that are both more-fire-resistant and more-earthquake resistant.