They're actually equally harmful.
Think.
Are you thirsty or hungry more when cold?
Are you thirsty or hungry more when hot?
In deserts, you need WATER. So your body ignores hunger and focuses on WATER, to cool you down.
In mountaintops, you need FOOD. So your body ignores thirst and focuses on FOOD, to warm you up.
Problem, human brain?
You will die from thirst, not hunger, in a very hot climate.
You will die from hunger, not thirst, in a very cold climate.
Discuss.