I had a Sony F-717 camera that was rated to 104 degrees and suffered seriously from overheating issues when temperatures got up around 110.
The F-717 did things like turn itself back ON again immediately after I turned it off. That, of course, just made things worse by making it hotter still. The other thing that would happen is picture color turned red and washed out which ruined every frame. :( I had that happen more than once.
Some things you might consider:
1-The best advice is to avoid heat and take pictures in the early morning. That is the coolest part of the day, usually has the least wind AND it has the best light. No better advice than that!
2-Another thing you can do is put your camera in an ice chest between session when driving from place to place. Just don't let it get wet. That helps greatly. On the hotter summer days I would have to keep the camera cool in an ice chest between stops.
3-Do your photography in shifts to avoid overheating your camera. The longer a camera is turned on, the hotter it gets. Turn it off periodically to keep it from overheating. Also, avoid leaving the camera in direct sunlight even OUTSIDE your vehicle while around your neck.
4-Remove the battery from the camera between shooting sessions when driving around to prevent it from unexpectedly turning itself back on again and burning up. This is only a problem if yours behaves like mine.
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