I don't understand this question, but if a person gets extremely cold and body drops to -86% somewhere along that number. It causes extreme cold, numbness, and if this happens your body might not be able to replenish.
You may need a lot of heat to cure that
'I am feeling cold.' is correct if you are feeling cold.
In the winter, the desert can be extremely cold and dry.
A chill is a mildly cold feeling.
It is very hot.
Tropical
Example: It was extremely cold yesterday.
If something is extremely hot and is kept in something extremely cold, it will cool off quickly and will likely create condensation depending on what it is. It will eventually become very cold as well, but that will take some time.
chilly
COLD
tundra
Antarctica
Exothermic/endothermic is a process not a feeling.