I used to live in Phoenix (48-1/2 years worth!!) and I would never leave the electricity turned off entirely during the summer - for any reason. I agree with those saying to set your a/c up around 90 or so at the highest. I remember many, many days when the temperature never went below 100, so,even when there are less above 100 days, it still gets ***** hot! This past summer was kind of strange with all the dust storms, etc.- used to have lots of them way back,in the olden days😄😄
We have the opposite - we inherited my in-laws house in upstate New York (Fulton County) and we leave the heat set about 55 so nothing freezes, including my mother-in-law's old Singer 66.