Cold effects

Cold effect in humans

 * 37°C (98.6°F) - Normal body temperature (which varies between about 36-37.5°C (96.8-99.5°F)
 * 36°C (96.8°F) - Mild to moderate shivering (it drops this low during sleep). May be a normal body temperature.
 * 35°C (95.0°F) - (Hypothermia) is less than 35°C (95.0°F) - Intense shivering, numbness and bluish/grayness of the skin. There is the possibility of heart irritability.
 * 34°C (93.2°F) - Severe shivering, loss of movement of fingers, blueness and confusion. Some behavioural changes may take place.
 * 33°C (91.4°F) - Moderate to severe confusion, sleepiness, depressed reflexes, progressive loss of shivering, slow heart beat, shallow breathing. Shivering may stop. Subject may be unresponsive to certain stimuli.
 * 32°C (89.6°F) - (Medical emergency) Hallucinations, delirium, complete confusion, extreme sleepiness that is progressively becoming comatose. Shivering is absent (subject may even think they are hot).  Reflex may be absent or very slight.
 * 31°C (87.8°F) - Comatose, very rarely conscious. No or slight reflexes.  Very shallow breathing and slow heart rate.  Possibility of serious heart rhythm problems.
 * 28°C (82.4°F) - Severe heart rhythm disturbances are likely and breathing may stop at any time. Patient may appear to be dead.
 * 24-26°C (75.2-78.8°F) or less - Death usually occurs due to irregular heart beat or respiratory arrest; however, some patients have been known to survive with body temperatures as low as 14.2°C (57.5°F).