My focus is home SIP, realizing anything you store in your home SIP will be tough to get to or stay good shape if it's in a nonventilated heat trapping solar oven of a home. I don't have solar-powered ventilation figured out, but my home is small. I will be getting things out of storage at night when its a little cooler with no power. Unless you figure out passive cooling (boosted by active solar where you need it most, perhaps) on your site, you will sleep outdoors without power. Doorlocks wont help, then. Local Historical accounts describe frontier military typically sleeping outside within fortifications in high summer. In the middle east, they sleep on rooftops. Your perimeter may not be your house itself. Ask: Can I see and get to stored emergency stuff at night with a solar yard lamp? So this is my plug for prepping for a heat emergency in place. Justifies a pool? In contrast: the worst place to shelter in place for a heat emergency is on the side of a road in a car stuck in traffic, but even there, principles apply. Which brings to mind a last point: check out old military desert survival videos from the library. They're kind of funny, too, and my kids loved them.

Am I going on too long on just this one emergency cooling aspect of the solar gadget topic? I'd love to see what would happen if you opened a discussion on emergency cooling in our area. Some people out there have passive cooling setups in their home I would love to hear firsthand feedback on. I still think a solar fan would provide the needed boost to make passive home cooling reliable.
Whatever we try simply has to be tested in the high summer, so prepping for making and testing a shelter on one's own idividual homesite this summer, IMO, is critical.
Every on-grid summer here is a gift to prepare for sheltering in place. (SIP)
SIP I think will apply to almost anything short of nuclear blast or big airborne contaminant. (If that happens, know your prevailing winds, which, in the valley, is almost totally east west morning night. Find a "wind rose" chart, from NOAA for specific prevailing winds. Cool research project to put a child up to.), In this less likey case, I'd find a route for myself out of the valley going north or south, and then the car bug-out bag get use!) Otherwise, to me, its all about home SIP.

back to the topic of solar gadgets, but still on a cooling shelter notion (EM people I had the chance to speak with were more concerned with this than food or water)...if you could switch and install and size something like a /surise solar fan (lok on website costs less than 300 bux) over a proper sized secure area with reasonable sheilds from heat gains,(not expecting to uniformly cool a 300 foot monster house) you could hang wet sheets and be totally within even typical comfort levels, which is necessary for small children, pregnant nursing moms, the ill, etc. Remember the Superdome in New Orleans, heat killed people. Body heat from crowding killed people. NOT Sheltering in place in a heat emergency is a hazard. the dryness of our Arid enviroment is a huge asset over humid climates. I would rather be in an arid climate off the grid than a humid one. There are things to know, though, and yet ( with our basic knowledge level EM has to speak to) we have to be told not to leave kids in cars in the summer. We can do better.

hi survivalmom! thanks for the response. I could talk all day about ways to meet this overheating concern. Other arid parts of the world have many fascinating climate responses. Acclimatization is a huge factor to be aware of, but not the whole picture. Before there was a/c, humans, besides being acclimatized, made many specific efforts to not die of heat. There is a broad and varied host of culturally held knowledge thats been lost at a flip of a switch. As your site so wonderfully expresses, not being acclimatized is analogous to depending on all kinds of unsustainable life support systems for ourselves and our families. But especially as a mom, its not enough to plan to just tough it out doing without. I like it how you go on to think of alternatives. I had a great time visiting Isreal once, too. Also Tunisia...did you kow Luke Skywalker's house is a non-airconditioned hotel near a town called Tatooine? (the film site is in Matmata) Boy, I'd love to share more...!