Good job adding your location!Greetings, I am in the U.S.A, Florida.
Though we do not have to deal with as much heat as you, we do have cold winters. Our coops are under trees, so good in the summer. We painted the coop dark colors (1 black 1 barn red w/black trim), to absorb the sun/warmth in the winter w/o leaves on the trees. What color is your coop? A light color might help reflect the sun as well. It may not matter with the tarp you have added.
Again, it's good to have you as a member!