Same here. I live in Middle East and nothing weird observed other than short flight time. But as he said not more than 3-5 minutes.
However I dont fly mid-day @ summer. Not for Phantom but it is not healhy for me under 50C
Most tablets/phones are rated to 35C, with the Shield rated to 30C. The pilot app is very processor intensive, so it really taxes tablets/phones. When it is too hot outside, the result is often lagging FPV or an overheat shutdown. The P3 itself is rated to 40C.
My guess is that there is some buffer in those numbers, but keep them in mind when making your decision to fly in extreme heat or not.