Reddit mentions of MistyMate 16030 Cool Patio 30 Outdoor Misting Kit

lol you’re not going to create a reverse heat island by buying a pool. My sister lived up by Desert Shores. It was still hot as hell.

You might want to invest in those little mister lines you can attach to building like this https://www.amazon.com/dp/B00166J3ZA but make sure you take care of it. The water out here is extremely hard. It will need to be cleaned or you’ll have clogged lines in a month.

If you’re worried about the dryness you need a humidifier for inside your home or relocate to Florida

Is he full Shar Pei, how heavy are his wrinkles (can he pant effectively) and how lean/fat is he (the leaner the dog, the better)?

Being in the desert does mean low humidity is helpful in that his panting will be more effective, however it's AZ and the heat will be high.

How shady is the location? He will need good quality shade. Having a small bit of shade while the area surround him is baking, won't do him much good. The best would be some good sized trees (trees do provide a cooling effect) with some areas never getting hit by sun. If not that, he'll need a good sized area (not just a patio umbrella).

I'd consider one of those temp car tents like this one: https://express.google.com/u/0/product/9240326482241299587_14428592836010735232_10891564?utm_source=google_shopping&utm_medium=tu_cu&utm_content=eid-lsjeuxoeqt%2Ceid-vqiqlmovzs&gtim=CPDum5vduN757QEQxoSjzPzR76prGLC1oL4BIgNVU0Qo4LiD5gUwrOKYBQ&utm_campaign=10891564&gclid=Cj0KCQjw-tXlBRDWARIsAGYQAmeOgM_voPrV24p_kJNuMo8n8tpWCwU4j8SwNK-PUDI7O4lVnQclaEkaAm65EALw_wcB You can roll up one side to improve the ventilation and keep one down if needed to maximize the shade. I'd also consider putting shade cloth - either over the tent if heat is coming through the fabric, to use as a side to allow better air circulation and/or additional shady area.

Shade cloth: https://www.amazon.com/Puppy-Aluminet-Shade-Cloth-Panels/dp/B00KGFJU32/ref=pd_day0_hl_199_8?_encoding=UTF8&pd_rd_i=B00KGFJU32&pd_rd_r=ec3cd2f8-602b-11e9-a944-2f3383ee933a&pd_rd_w=5Nmtq&pd_rd_wg=oRdtD&pf_rd_p=ad07871c-e646-4161-82c7-5ed0d4c85b07&pf_rd_r=18VNP5RYP9DZS2EP2W2B&psc=1&refRID=18VNP5RYP9DZS2EP2W2B

I'd definitely get him a wading pool and keep the water a clean as possible. Put a tarp on the ground around it so he doesn't get dirty. While he may not care to get into it now, that level of heat may change his mind.

I would also make sure to have a hose around. With that low humidity, wetting him down will absolutely help. You will need to do it often.

Alternately, and perhaps better would be a misting system like this https://www.amazon.com/MistyMate-16030-Patio-Outdoor-Misting/dp/B00166J3ZA/ref=asc_df_B00166J3ZA/?tag=hyprod-20&linkCode=df0&hvadid=194003459169&hvpos=1o1&hvnetw=g&hvrand=14037802612619025603&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9005779&hvtargid=aud-643574997066:pla-312625313697&psc=1.

A fan may help in that a breeze will help his panting to be more effective, however, blowing super hot air isn't so great.

if you can get an insulated dog house with AC or Evaporative cooler that would be fantastic.