What we do have is trees and a particular type of tree called the Holme Oak which is an ever green oak on this mountain. This tree provides excellent shade all year round.
Part of chicken keeping must surely be providing an environment in which they can thrive.
I don't wish to appear rude but this it's all different in America up here in the desert really needs some education about what it's like in the rest of the world.

If one was to be particularly brutal in commenting then my comment would be if the climate is so arid and hot and nothing will grow to provided shade then I can't help questioning the wisdom of keeping chickens in the first place.
One doesn't for example extreme though it is try to keep polar bears in a desert.
A bit further South is a country called Morocco. It gets hot there and they have a lot of desert. They keep chickens. They were keeping chickens before America was invented.

The villages tend to let the chickens shelter in the clay built houses that keep very cool due to their construction. They also build funny looking domes out of clay with multiple entrances that allow the breeze to blow through.
Electricity if supplied at all, is problematical and expensive, so misting systems, fans, air conditioning aren't really options.
It is worth bearing in mind before making any patronizing comments that other countries have been keeping chickens for a very very long time compared to the US and may just know something about the subject.