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.
A chill is a mildly cold feeling.
In the winter, the desert can be extremely cold and dry.
The tundra is an extremely cold and dry ecosystem
Tempid.
Extremely cold, -328 ℉
chilly
It is very hot.
Example: It was extremely cold yesterday.
Tropical
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.
Exothermic/endothermic is a process not a feeling.