Hypothermia & Hyperthermia

Hypothermia - Too Cold

Normal Body Core 37.4 Degrees C


1. Shiver Start

2. Shiver Stop

3. Switch Off

4. UMBLES  (Stumble/Mumble/Fumble/Grumble/Tumble)

5. Drowsy

6. Unconscious  (28 Degrees C)

7. Cardiac Arrest (24 Degrees C)

Definitely By Step Four Above (UMBLES) You Are Calling 112 For Mountain Rescue

Being Too Cold Turns Into Hypothermia






Hyperthermia - Too Hot

Normal Body Core 37.4 Degrees C


1. Sweat Start

2. Cramp/Headache/Dizzy/Nausea

3. Sweat Stop

4. UMBLES  (Stumble/Mumble/Fumble/Grumble/Tumble)

5. Unconscious  (41 Degrees C)

Definitely By Step Three Above (Sweat Stop) You Are Calling 112 For Mountain Rescue

Being Too Hot Turns Into Heat Exhaustion, Which Then Turns Into Heat Stroke/Hyperthermia



This is a simple partial guide, as a resource, for students completing our training courses. This is not to be fully relied on as there are in-depth sessions for prevention, recognition, treatment, evacuation of both hypothermia and hyperthermia.

Marie from Remote West First Aid runs our in-house REC First Aid Training and I highly recommend her. Nathan - Outdoors Ireland