We had 39 C (102F) the other day, almost unheard of here. Dug the portable air conditioner for the house out of storage, hadn't needed it for 2 or 3 years. Plugged it in and nothing, opened it up and found mice had destroyed the wiring. Had to make a run to town for a replacement. The machine shop was at 18C (64 F) at the beginning of the heat wave, its climbed up to 20 C (68 F). It has 8 inch thick walls, insulation in the ceiling below the cabinet shop and well shaded with big trees. Been spending a lot of time out there these days.
Greg