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Signs and Symptoms of Hypothermia

Body Temp Symptoms Observable
by Others
Felt by
Yourself
°F°C
98.6
to
95.0
37
to
35
Intense and uncontrollable shivering; ability to perform complex tasks impaired. Slowing of pace. Intense shivering. Poor coordination Fatigue. Uncontrollable fits of shivering. Immobile, fumbling hands.
95.0
to
91.4
35
to
33
Violent shivering persists, difficulty in speaking, sluggish thinking, amnesia begins to appear. Stumbling, lurching gait. Thickness of speech. Poor judgement. Stumbling. Poor articulation. Feeling of deep cold or numbness.
91.4
to
87.8
33
to
31
Shivering decreases; replaced by muscular rigidity and erratic, jerky movements; thinking not clear but maintains posture. Irrationality, incoherence. Amnesia, memory lapses. Hallucinations. Loss of contact with environment. Disorientation. Decrease in shivering. Stiffening of muscles. Exhaustion, inability to get up after a rest.
87.8
to
85.2
31
to
29.5
Victim becomes irrational, loses contact with environment, drifts into stupor; muscular rigidity continues; pulse and respiration slowed. Blueness of skin. Decreased heart and respiratory rate. Dilation of pupils. Weak or irregular pulse. Stupor. Blueness of skin. Slow, irregular, or weak pulse. Drowsiness.
85.2
to
78.8
29.5
to
26
Unconsciousness; does not respond to spoken word; most reflexes cease to function; heartbeat becomes erratic. Unconsciousness.
78.8
and
less
26
and
less
Failure of cardiac and respiratory control centers in brain; cardiac fibrillation; probable edema and hemorrhage in lungs; apparent death.

 Last updated: 18 November 2016
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