I’m in Austin, so we deal with similar challenges in summer – very hot, intense direct sun and very dry. Shade cloth has been a lifesaver. It’s allowed for much less watering and less stress on the plants. I wasn’t sure if a 75% shade cloth would allow enough sun through, but everything in the garden (even the sun loving peppers, tomatoes and eggplant) are doing better than ever. July/August will be the real test!