The concept of wet-bulb temperature

AFP English

The concept to the wet-bulb heat indicator combines temperature and humidity. When it goes above 35°C (or 35°C of dry heat and 100% d'humidity), a person in good health can die in six hours.  VIDEOGRAPHIC

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00:00 The wet bulb heat indicator combines temperature and humidity.

00:12 When it goes above 35 degrees Celsius, or 35 degrees of dry heat and 100% humidity,

00:18 a person in good health can die in 6 hours.

00:23 In normal periods when the outside temperature rises, the blood vessels dilate, the sweat

00:28 pores become active and drops of sweat are produced on the skin, cooling the body when

00:33 they evaporate.

00:36 When a wet bulb temperature of 35 degrees Celsius is reached, the humidity in the air

00:40 hinders perspiration and evaporation.

00:45 The heat is thus retained and the body is unable to regulate its temperature, which

00:49 can lead to heat stroke, organ failure and ultimately death.

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