We had two recent call-outs, both fatalities due to heat stroke. Remember, heat stroke is not the same as dehydration. Heat exhaustion to heat stroke may be stoppable by extreme rapid cooling. This is the bodies inability to thermal regulate. It doesn't matter your hydration if your body cannot cool itself. If you find yourself in heat exhaustion, stop, find shade, cool off. If you vomit or experience a change in mental status, SOS immediately. This is emergent and life threatening.