This website is not affiliated with the U.S. government or military.

Heat Injuries

Types, treatment, risk factors, control measures

Click here to download the presentation.


Types of Heat Injury

Heat Cramps

Heat Exhaustion

Heat Stroke

Heat Cramps

Painful cramping of the larger muscle groups

legs, arms, abdomen

Due to excessive loss of salt through heavy sweating plus several hours of sustained exertion

acclimatization decreases risk


shaded area

massage arms/legs to increase circulation

0.1% salt solution orally (1/2 tsp salt in 1-qt. Water), sports drink, or salted food (MRE) plus fluid

Heat Exhaustion


heavy sweating, headache, light-headed, nausea/vomiting, tingling sensations

Temperature 99-104 F


dehydration plus excessive salt depletion


shaded environment; loosen clothing

If suspect early heat stroke, treat as such

oral fluids if can drink

cold water, 0.1% salt solution, or 6% carbohydrate beverage

1-2 liters over 2-4 hours


Heat Stroke


elevated temperature plus central nervous system disturbance

absence of sweating is a late finding

Can begin as heat exhaustion and progress

End-organ damage:

brain damage, kidney failure, liver failure, blood clotting abnormalities

related to duration of elevated temperature

Treatment of Heat Stroke


Unconscious patient may vomit and aspirate

IV: no more than 2L unless circulatory collapse

Lower the body temperature as fast as possible!

All clothes off

Cool water with fanning…increase evaporation

Ice packs under groin or axilla

EVAC…open doors/windows in helicopter/vehicle

keep cooling to temp 101-102 F.

Ice-water immersion: controversial

USASOC and TB MED do not recommend

Wilderness Medicine, 3rd ed. supports

Risk Factors for Heat Stroke


Respiratory and GI illnesses most common

Alcohol use

Laxatives and diuretics


Increase heat production and/or decrease heat loss

pseudoephedrine, thyroid hormone, cocaine

Decrease sweating

antihistamines (Benadryl), anti-nausea (meclazine, phenergan)


Ephedrine (MaHuang), caffeine

Control Measures

Water and sports drinks



OTSG Guidance for the Field Use of Sports Drinks

Cool water is usually the best rehydration fluid

Prolonged training and operational scenarios

carbohydrates and electrolytes are also required for optimal physical and mental performance

meals and snacks plus water are best

When sports drinks are appropriate:

duration > 6 hours, hot weather, if snacks/meals not consumed

duration > 3 hours, strenuous exercise, if snacks, meals not consumed

duration > 6 hours strenuous exercise, if total food intake is significantly limited

Sports Drink Recommendations

INGREDIENT Amount per 8 ounces (as served)

Sodium 55-160 mg

Potassium 20-55 mg

Carbohydrate 11-19 gm


Physiologic adaptation that occurs in response to heat exposure in a natural environment

5 days for most

14 days required for 95% of population to have complete acclimatization.

Can deacclimatize as quickly


sweat at lower temperature

increased volume of sweat

decrease in amount to salt secreted in sweat

increased heat dissipation = lower core body temperature

End result: Decreased risk for heat injury!

Fluid Replacement Guidelines for Warm Weather Training


Privacy Policy | About Us | FAQ | Terms of Service | Disclaimers | Do Not Sell My Personal Information (CA and NV residents)

Copyright © 2023 EducationDynamics. All Rights Reserved.

This is a private website that is not affiliated with the U.S. government, U.S. Armed Forces or Department of Veteran Affairs. U.S. government agencies have not reviewed this information. This site is not connected with any government agency. If you would like to find more information about benefits offered by the U.S. Department of Veteran Affairs, please visit the official U.S. government web site for veterans’ benefits at

The sponsored schools featured on this site do not include all schools that accept GI Bill® funding or VA Benefits. To contact ArmyStudyGuide, email us.

Disclosure: EducationDynamics receives compensation for the featured schools on our websites (see “Sponsored Schools” or “Sponsored Listings” or “Sponsored Results”). So what does this mean for you? Compensation may impact where the Sponsored Schools appear on our websites, including whether they appear as a match through our education matching services tool, the order in which they appear in a listing, and/or their ranking. Our websites do not provide, nor are they intended to provide, a comprehensive list of all schools (a) in the United States (b) located in a specific geographic area or (c) that offer a particular program of study. By providing information or agreeing to be contacted by a Sponsored School, you are in no way obligated to apply to or enroll with the school.

This is an offer for educational opportunities that may lead to employment and not an offer for nor a guarantee of employment. Students should consult with a representative from the school they select to learn more about career opportunities in that field. Program outcomes vary according to each institution’s specific program curriculum. Financial aid may be available to those who qualify. The financial aid information on this site is for informational and research purposes only and is not an assurance of financial aid.

VFW $30,000 Scholarship!
Write an essay on the annual patriotic theme. This year’s theme is, “Why Is The Veteran Important?”