July 12, 2006
By Thabang Mokoka
AS winter temperatures continue to drop, the City of Johannesburg is warning people of the dangers of hypothermia.
This message is part of the Winter Safety Campaign that has been running since Wednesday, 31 May informing residents of the dangers of extreme cold and of fires.
This is part of the City's Qaphela campaign. Qaphela means "be careful, pasop, ingozi".
Hypothermia is when the body temperature drops from its normal rate of around 37 degrees. Mild hypothermia is a drop to between 32 and 30 degrees, while severe hypothermia sees the body temperature go below 30 degrees. Hypothermia can be fatal when the body temperature drops below 27 degrees and the very young or very old are the most vulnerable.
Symptoms to look out for are shivering, stiff limbs, low blood pressure, a slow pulse and fluctuating levels of consciousness.
"This winter is colder than last year and we are seeing quite a few more cases," says spokesperson for Johannesburg Emergency Management Services (EMS), Malcolm Midgley.
People are being encouraged to keep warm and wear as much clothing as possible.
"We are also advising people to pack cardboard and newspapers in their clothes and shoes to keep the heat in. Even a plastic bag can be wrapped around you and used as a kind of a windbreak."
Officials from the City's emergency services have been knocking on doors across Johannesburg advising residents of what action to take against cold weather.
Most body heat is lost through the "core" of the body: the head, chest, armpit and groin, where the blood flows closer to the skin, according to an emergency medicine specialist, Dr Charl van Loggerenberg.
Wearing a hat could cut down on the loss of body heat by about 20 percent, Van Loggerenberg said, adding that wearing damp or wet clothes could also cause heat loss.
The quickest way to help people with heat loss is to immerse the limbs – not the whole body – into warm water. "This helps get the blood flowing through the anastomoses in the hands and feet – vessels which bypass the capillaries and have a very high blood flow – directly to the body's core," according to an EMS press release.
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