Living in an area where the temperature is well over 100 degrees F every day for weeks on end, one just gets used to it you learn to deal with it. Before I retired, I worked an outdoor job and realized that the Pioneers that settled Arizona had to live with the heat and by staying hydrated and in the shade, life goes on. Of course, adapting to heat like that, makes temperatures down into the 70's seem cold and requires a jacket. To capture a sunset out in the desert with the sun peeking over from behind a mountain peak sometimes requires one to fly beyond line of sight. So imagine my horror to be watching the scene on my iPad and suddenly, with only seconds of a warning, my iPad just shut down! Fortunately, I pressed return to home and after several heart stopping moments I heard my Phantom 4 returning, and once in sight, I was able to control it with the controller and landed it. Undoubtedly it would have landed by itself, but I hand catch it to avoid it having to work in a cloud of dust. I think the cold pack is good advise to keep the iPad cool. I will use it the next time, but I did learn that the Phantom still works even without the iPad being on, and that in the heat, I'd better keep it in sight.