New Prepper Group - Survival & Health

 

COLD WEATHER PRECAUTIONS

COLD WEATHER PREPAREDNESS

It looks like another harsh winter, with ice storms and blizzards already carpeting much of the Midwest, Northeast and Canada, and cold weather preparedness is a must for survival.  Failure to use precautions will lead to a condition called hypothermiaHypothermia is a condition where the core body temperature drops below 95 degrees Fahrenheit.  The normal body core temperature is defined as between 97.5-99.5 degrees Fahrenheit (36.0-37.5 degrees Celsius).

In your efforts to be medically self-reliant, one of the major factors that must be taken into consideration is your environment.  If you haven’t prepared for the weather, you have made your environment your enemy, and it is a formidable one. The last ice storm caused 27 deaths, some of which were avoidable.  Therefore, it’s important to be prepared to prevent death from exposure and to know how to treat someone who is hypothermic.

HOW YOUR BODY LOSES HEAT

Your body has various methods it uses to control its internal “core” temperature, either raising it or lowering it to appropriate levels.  The body “core“ refers to the major internal organ systems that are necessary to maintain life, such as your brain, heart, liver, and others.

In cold weather, your blood vessels constrict to conserve heat. Muscles “shiver” as a method of heat production. You can voluntarily increase heat by exertion; it is recommended to “keep moving” in cold environments for this reason. Part of the healthcare provider’s role is to educate each and every member of their family or group on proper planning for outdoor activities. Monitor weather conditions as well as the people you’re sending out in the heat or cold.

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The body loses heat in various ways:

Evaporation – the body perspires (sweats), which releases heat from the core.

Radiation – the body loses heat to the environment anytime that the ambient (surrounding) temperature is below the core temperature (say, 98.6 degrees Fahrenheit).  For example, you lose more heat if exposed to an outside temperature of 20 degrees F than if exposed to 80 degrees F.

Conduction – The body loses heat when its surface is in direct contact with cold temperatures, as in the case of someone falling from a boat into frigid water. Water, being denser than air, removes heat from the body much faster.

Convection – Heat loss where, for instance, a cooler object is in motion against the body core.  The air next to the skin is heated and then removed, which requires the body to use energy to re-heat. Wind Chill is one example of air convection: If the ambient temperature is 32 degrees F but the wind chill factor is at 5 degrees F, you lose heat from your body as if it were actually 5 degrees F.

Most heat is lost from the head area, due to its large surface area and tendency to be uncovered.  Direct contact with anything cold, especially over a large area of your body, will cause rapid cooling of your body core temperature.  The classic example of this would be a fall into cold water.  In the Titanic sinking of 1912, hundreds of people fell into near-freezing water.  Within 15 minutes, they were probably beyond medical help.

PHYSICAL EFFECTS OF HYPOTHERMIA

Aside from shivering, the most noticeable symptoms of hypothermia will be related to mental status.  The person may appear confused, uncoordinated, and lethargic.  As the condition worsens, speech may become slurred; the patient will appear apathetic and uninterested in helping themselves, or may fall asleep.  This occurs due to the effect of cooling temperatures on the brain; the colder the body core gets, the slower the brain works.  Brain function is supposed to cease at about 68 degrees Fahrenheit, although I have read of exceptional cases in which people (usually children) have survived even lower temperatures.

To prevent hypothermia, you must anticipate the climate that you will be traveling through, including wind conditions and wet weather. Condition yourself physically to be fit for the challenge. Travel with a partner if at all possible, and have enough food and water available for the entire trip.

PREVENTION STRATEGIES FOR HYPOTHERMIA

In your efforts to be medically self-reliant, one of the major factors that must be taken into consideration is your environment.  If you haven’t prepared for the weather, you have made your environment your enemy, and it is a formidable one.

Remember the simple acronym C.O.L.D. This stands for:  Cover, Overexertion, Layering, and Dry:

Cover. Protect your head by wearing a hat. This will prevent body heat from escaping from your head. Instead of using gloves to cover your hands, use mittens. Mittens are more helpful than gloves because they keep your fingers in contact with one another.  This conserves heat.

Overexertion. Avoid activities that cause you to sweat a lot.  Cold weather causes you to lose body heat quickly, and wet, sweaty clothing accelerates the process. Rest when necessary; use rest periods to self-assess for cold-related changes. Pay careful attention to the status of your elderly or juvenile group members.

more @ http://www.doomandbloom.net/cold-weather-preparedness/

 

 

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