Summer is upon us, and with the summer heat comes heat stress, which can lead to a number of ailments, including (from mildest to most severe) heat rash, heat cramps, heat exhaustion and heat stroke.
Working through hot conditions stresses the body’s cooling system. When the hot summer temperatures combine with such factors as hard physical work, dehydration, fatigue, or other medical conditions, the result can be illness, disability and even death.
While younger and more physically fit workers tend to be less likely to have problems, the fact is, heat stress can lead to problems for anyone of any age, including the physically fittest. Workers with heart, lung or kidney disease, diabetes and those taking medications are more likely to experience heat stress problems. In addition, workers who use diet pills, sedatives, tranquilizers can be at higher risk for heat stress. Drinks containing caffeine or alcohol can exacerbate the effects of heat stress, as well.
If you are a supervisor, keep an eye out for symptoms of heat stress among your workers, because the victims of these afflictions are often unaware of the symptoms, and their survival may depend on your ability to identify symptoms and seek immediate medical assistance. The symptoms of every stage of heat stress are as follows:
Condition Symptoms Proper Response:
Heat Cramps Painful muscle spasms and heavier than usual sweating Drink lots of water and rest in the shade or a cooler environment.
Dehydration Marked by a high level of fatigue, and difficulty moving. Drink lots of water (try to stay away from drinks with caffeine and/or sugar) and rest in the shade or a cooler environment.
Heat Exhaustion Marked by pale, clammy skin, heavy sweating, weakness and fatigue, nausea or dizziness. Can also cause blurred vision and/or fainting. The body temperature may also be slightly above normal. Lie down immediately in cool environment, remove any personal protective equipment and loosen clothing. If the symptoms continue, call an ambulance.
Heat Stroke Marked by hot, dry skin because the body stops sweating, red face, and high body temperature. It can also lead to collapse, lack of consciousness, convulsions, confusion or erratic behavior. Immerse worker in water, in the shade, and call for an ambulance immediately, because this is a life threatening condition.
Workers and supervisors have a responsibility to limit the effects of heat stress on the job.
Supervisors should:
• Prepare to allow 2-3 weeks for employees to get used to the summer heat. It often takes that long for a worker to become acclimated to a hot environment.
• If possible, move work around, so that heavier work can be done in the coolest part of the day. If a heat wave is only supposed to last for a couple of days, schedule lighter work for the hottest days.
• Try to reduce the workload by increasing the use of equipment on hot days, in order to reduce physical labor.
• Establish a schedule that allows for work and rest periods during hot days.
• Review with workers how to recognize signs and symptoms of heat stress disorders.
• Make sure you or someone else in the workplace is prepared to administer first aid if necessary.
• Know ahead of time who among your workers are “high risk” employees for hot work environments for extended time periods, and divvy up the work accordingly. Understand that individual workers vary in their tolerance to heat stress conditions.
• If possible, provide cooled rest areas, increase the number and length of rest breaks and provide plenty of cool drinking water near workers.
Workers should:
• Learn to recognize the signs and symptoms of heat stress.
• Be sure to pace your work and take regular rest periods in shade or cooler environment.
• Use fans for ventilation and cooling, especially when wearing personal protective equipment (PPE) or working around equipment that is hot.
• Be sure to wear lightly colored and loose clothing, unless you’re working close to equipment with moving parts.
• Reduce the physical demands of your work by using aides, such as hoists. The less you exert yourself, the better.
• Whenever possible stay shaded from direct heat by wearing a hat, and applying sunscreen.
• Above all, drink plenty of water. Do not wait until you’re thirsty. Drink before you’re thirsty. And be aware that sports drinks are not necessary, plain water works well.
With hot weather now upon us, workplaces have to protect their workers from the effects of heat stress. By doing so, everyone can prevent workplace injury, illness and even death.