Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

heat stress


Published on

Published in: Environment
  • Be the first to comment

  • Be the first to like this

heat stress

  1. 1. TIPS TO FIGHT HEAT STRESS Start drinking water (before you start work). Drink water (As much as you need). Check your Urine color (note the urine color). Ensure adequate ventilation. Rotate work (from hot to cool areas). Report to your Supervisor or the Nurse at first sign of any problem. Keep an eye on your work mates. The Color of Urine Tells You How Dehydrated You Are! Heat Stress Campaign – Day - 6MUTHURV-
  2. 2.  Heat cramps affect muscles used while working, such as those in the arms, legs, and abdomen. Cramps may occur after work, while you’re resting. They signal that the body has sweated too much salt.  Heat exhaustion may bring feelings of exhaustion, nausea, dizziness, pale clammy skin, quick pulse, and low blood pressure. It’s a warning that the mechanism that controls the body’s heat is seriously overtaxed. Heat stroke may follow if heat exhaustion is not treated.  Heat stroke is serious and can be fatal. The body’s heat control mechanism shuts down. Perspiration stops and the body temperature rises. The heart pounds and the skin becomes flushed and hot. It’s a medical emergency. Get treatment immediately. Working in an excessively hot environment can be difficult … even fatal. Heat creates many safety problems and illnesses, including heat cramps, heat exhaustion, and heat stroke. These illnesses are called hyperthermia. Heat can also cause you to become inattentive, short-tempered, dizzy, and slow, leading you to work in an unsafe manner. Add humidity and the effects are compounded. Watch for these warning signs: To reduce your risk of heat illness:  Gradually adapt to working in the heat. If the weather suddenly turns hot or you’re transferred to a hot environment, take it easy until you are acclimatized.  Drink water often. The body loses water through perspiration, so you need to replenish it. Don’t drink alcoholic or caffeinated beverages; they cause you to lose even more water and salt.  Take frequent rest breaks. Move to a cooler area or switch to lighter work periodically.  Get a physician’s advice before replacing salt. Salt tablets aren’t recommended. Lightly salted food or mineral drinks may be better.  Dress lightly, in layers so that you can subtract or add clothing as the temperature changes. Be sure to shade your skin from the sun. Heat Stress Avoid It Heat Stress Campaign – Day - 5 MUTHURV
  3. 3. MUTHURV WHAT PERSONAL FACTORS ARE USED TO ASSESS HEAT STRESS RISK? It is difficult to predict just who will be affected by heat stress and when, because individual susceptibility varies. There are, however, certain physical conditions that can reduce the body’s natural ability to withstand high temperatures: Weight - Workers who are overweight are less efficient at losing heat. Poor physical condition - Being physically fit aids your ability to cope with the increased demands that heat places on your body. Previous heat illnesses - Workers are more sensitive to heat if they have experienced a previous heat- related illness. Age - As the body ages, its sweat glands become less efficient. Workers over the age of 40 may therefore have trouble with hot environments. Acclimatization to the heat and physical fitness can offset some age- related problems. Heart disease or high blood pressure - In order to pump blood to the skin and cool the body, the heart rate increases. This can cause stress on the heart. Recent illness - Workers with recent illnesses involving diarrhea, vomiting, or fever have an increased risk of dehydration and heat stress because their bodies have lost salt and water. Medication - Certain drugs may cause heat intolerance by reducing sweating or increasing urination. People who work in a hot environment should consult their physician or pharmacist before taking medications. Lack of acclimatization - When exposed to heat for a few days, the body will adapt and become more efficient in dealing with raised environmental temperatures. This process is called acclimatization. Acclimatization usually takes 6 to 7 days. Benefits include •lower pulse rate and more stable blood pressure •more efficient sweating (causing better evaporative cooling) •improved ability to maintain normal body temperatures. Acclimatization may be lost in as little as three days away from work. People returning to work after a holiday or long weekend—and their supervisors— should understand this. Workers should be allowed to gradually re-acclimatize to work conditions. Heat Stress Campaign – Day - 4
  4. 4. MUTHURV WHAT ARE THE RESPONSIBILITIES OF WORKPLACE PARTIES REGARDING HEAT STRESS? Heat stress is always a threat in the construction industry here in Saudi Arabia during summer season. And without the support from management and cooperation from workers, this threat can lead to untoward incident. Let’s work together to beat the heat! WORKERS •Follow instructions and training for controlling heat stress. •Be alert to symptoms in yourself and others. •Avoid consumption of alcohol, illegal drugs, and excessive caffeine. •Find out whether any prescription medications you’re required to take can increase heat stress. •Get adequate rest and sleep. •Drink small amounts of water regularly to maintain fluid levels and avoid dehydration. SUPERVISORS •The supervisor should visually monitor personnel to note for signs of heat stress. •Instruct workers to observe for symptoms of heat stress and methods on how to control it. Adjust work practices as necessary when workers complain of heat stress. •Make controlling exposures through engineering controls the primary means of control wherever possible. •Oversee heat stress training and acclimatization for new workers and for workers who have been off the job for a while. •Provide worker education and training, including periodic toolbox talks on heat stress during hot weather or during work in hot environments. •Monitor the workplace to determine when hot conditions arise. •Determine whether workers are drinking enough water. •Determine a proper work/rest regime for workers. Heat Stress Campaign – Day - 3
  5. 5. MUTHURV When work is performed in a hot environment, blood is sent to the skin to cool the body, primarily through evaporation of sweat. As sweating continues, often at a rate of more than 1 litre per hour, the body loses lots of fluid. This can compromise heart and circulatory function and the ability to work. If fluids are not replaced in time, the temperature- regulating process begins to break down, work becomes impossible, and the possibility of life-threatening heat stroke increases dramatically. Heat Stress Campaign – Day - 2 THE HEAT IS ON! Introduction Many people all over the world over suffer from heat related illness during summer. Especially in Middle East where summer temperatures are usually in the range of 45 to 55 C, it is imperative for all of us to understand the heat stress and take necessary preventive steps to mitigate the impact. Mechanism of Body Fluid Loss Following 6 Factors Can Lead To Heat Stress •Temperature •Humidity •Movement of air •Radiant temperature of surroundings •Amount and type of clothing •Physical activity Increase your fluid intake Regardless of your activity level or thirst, during high exertion periods in summer, drink 2- 4 glasses (16-32 ounces) of cool fluids each hour.
  6. 6. MUTHURV HEAT STRESS WHAT IS IT AND HOW IT AFFECTS YOU? Heat Stress Campaign – Day - 1 Heat Stress Treatments Heat rash Heat rash—also known as prickly heat—is the most common problem in hot work environments. Symptoms include red blotches and extreme itchiness in areas persistently damp with sweat prickling sensation on the skin where sweating occurs. Treatment—cool environment, cool shower, thorough drying. In most cases, heat rashes disappear a few days after heat exposure ceases. If the skin is not cleaned frequently enough the rash may become infected. Heat cramps Under extreme conditions, working for several hours, the body may lose salt through excessive sweating. Heat cramps can result. These are spasms in larger muscles—usually back, leg, and arm. Cramping creates hard painful lumps within the muscles. Treatment—stretch and massage muscles; replace salt by drinking commercially available carbohydrate/electrolyte replacement fluids. Heat exhaustion Heat exhaustion occurs when the body can no longer keep blood flowing to supply vital organs and at the same time send blood to the skin to reduce body temperature. Signs and symptoms of heat exhaustion include: Weakness, Difficulty continuing work, Headache, Breathlessness, Nausea or vomiting, feeling faint or actually fainting. Treatment—heat exhaustion casualties respond quickly to prompt first aid. If not treated promptly, however, heat exhaustion can lead to heat stroke—a medical emergency. Call Emergency Response Team. Help the casualty to cool off by: Resting in a cool place; drinking cool water; removing unnecessary clothing; loosening clothing; showering or sponging with cool water. It takes 30 minutes at least to cool the body down once a worker becomes overheated and suffers heat exhaustion. Heat stroke Heat stroke occurs when the body can no longer cool itself and body temperature rises to critical levels. WARNING: Heat stroke requires immediate medical attention. The primary signs and symptoms of heat stroke are: Confusion, Irrational behavior, Loss of consciousness, Convulsions, Lack of sweating, Hot dry skin, Abnormally high body temperature—for example, 41°C. Heat Stress Treatments Treatment —For any worker showing signs or symptoms of heat stroke, Call Emergency Response Team; Provide immediate, aggressive, general cooling; Immerse casualty in tub of cool water or place in cool shower or spray with cool water from a hose; Wrap casualty in cool; wet sheets and fan rapidly. Transport casualty to hospital. Do not give anything by mouth to an unconscious casualty.