Does the Android OS provide any overheating protection?
Within the BatteryManager documentation for Android there is a constant that can be used to check against that is named BATTERY_HEALTH_OVERHEAT. This would lead me to assume that there is a check that the OS does against this value, though I have never personally experienced a warning like this. I did on my old iPad, but being a recent Android convert I haven't had the time to find out about this just yet.