They always say that infants and elderly are most at risk. Why? The human body is not so good at regulating its temperature. It gets much worse if it’s hard work to keep topping up to prevent dehydration. Even worse again if you choose to not do so because it hurts to struggle to the toilet. That’s when you nod off, then coma, then organ failure and never never land.

http://emergency.vic.gov.au/prepare/?fbclid=IwAR0cJQkpyHXKq3MYHxZ6RCEFa7h24kl7MYLMSmFxcTFyKKXlJROf5W1wojY#extreme-heat/preparing-for-extreme-heat