another thing, (why I got out of florida - ft myers) adding more insulation in my moms house and putting in another simple roof vent made a huge differencegiven that's out and a/c is out-, I would dig a hole in your sand immediately it will be cooler down deep, I hesitate to make it too wet, moist would be better, you could also tent a large wet beach towel over the hole and keep it wet, this will cool somewhat (emergency survival one o one) Let the chickens in or out if they wish, if they stay in your hole, you'll know it's helping..........good luck.
