Bees cool the hive by evaporative cooling and we know swamp coolers don’t work very well in humid Florida. Last summer it was probably as hot, or hotter, in Michigan in July/Aug (Record heat for us). My bees were in polystyrene boxes with nothing more than a small top entrance or a small bottom entrance for ventilation. The top entrance hives really did the best since the hottest air could flow out the top and not be trapped inside the hive. Not much bearding in those top entrance hives. The polystyrene kept out radiate heat from the sun which is pretty significant in the summer. 100’s of watts of energy.