In Lake Havasu City, AZ, I have no problem with the heat on my Phantom 4. Have flown it in lots of heat, but I have to fly illegally because if I step out into the 110 degree heat my Ipad only takes about 4 or 5 minutes before it quits. Doesn't efect the P4 but I can't see what it's doing so I have to hit RTH and bring it back. On the other hand, sitting in the air conditioned truck, the P4 doesn't get very far away before I lose signal. So we are moving away from here. Dry heat or not, 110 every day gets old!