Here in the high desert of New Mexico we don't have the humidity but the sun is brutal due to less atmosphere to block it. Roof shade, windshield shade, and tinting are all good but IMO, even combined, they do little to lower the final inside temperature when the car is sitting out in the sun.
Same is true of Cabin Overheat Protection because it turns off after 12 hours. It is obviously not meant to protect the interior from getting hot. The purpose is to save the life of a child or pet that was inadvertently left in the car. Tesla says:
This feature is intended for passenger comfort and has no impact on the reliability of your vehicle's components.
A year ago Elon boasted that no child (or pet?) had died due to being left inside a Tesla.
IMO the car is designed to handle the high temps. I am more concerned about other items that stay in the car such as a usb drive.
Hot Weather Best Practices
Operating Climate Controls
Learn how to operate and customize the interior climate.
www.tesla.com