UNIT 15 Heat Radiation Phy Pysco

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1.11 Heat and Radiation In this section, we will look at the effects of exposure to extremes of temperature (hot & cold) and the preventative measures. 1.11.1 Heat Heat can be more than uncomfortable. It can be dangerous and even deadly. Summer weather is a common cause of heat problems. Workers are also exposed to heat in boiler rooms, laundry facilities, and confined spaces and during welding or brazing. Too much heat can cause a number of health problems . Health Effects. Being exposed to heat can cause any of the following symptoms: •  Heat rash,  also known as prickly heat . •  Heat cramps - these are painful muscle spasms. The cramps are usually felt in the arms, legs and stomach area. They usually occur after sweating heavily and not drinking enough liquids . • Heat exhaustion - symptoms include tiredness, dizziness, clammy skin, heavy sweating, loss of appetite, nausea and pain in the stomach area. These symptoms are brought on when the body loses too much fluid (dehydration) during hard physical labour. • Heat Stroke – this occurs when the body can no longer cool itself. The person's skin becomes hot and red or blotchy, and their body temperature is as high as 41°C degrees or more. Heat stroke can cause a person to lose consciousness and go into a coma. Heat Stroke Can Kill. Heat stroke is a condition that needs immediate medical attention. Other effects of exposure include heart disease. Workers also become less alert and are more likely to injure themselves or others .

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