The answer is trees everywhere in numbers that you don’t find in western cities. Like 100x the number of trees normally found in a city. The benefits aren’t just in temperature but also air quality, biodiversity, etc etc.
Edit: for those saying “But there’s not enough water”, I strongly suggest reading “Rainwater Harvesting in Drylands and Beyond” written by Brad Lancaster in Arizona. For those who don’t want to read the book, check out his TED Talk here (warning: his enthusiasm is infectious and you’ll want to read the book afterward): https://m.youtube.com/watch?v=I2xDZlpInik
Edit: for those saying “But there’s not enough water”, I strongly suggest reading “Rainwater Harvesting in Drylands and Beyond” written by Brad Lancaster in Arizona. For those who don’t want to read the book, check out his TED Talk here (warning: his enthusiasm is infectious and you’ll want to read the book afterward): https://m.youtube.com/watch?v=I2xDZlpInik