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Based on: Based on: • The General Duty Clause of the Occupational Safety and Health—Section 5(a)(1) • Materials from OSHA and state labor agencies on heat exposure • Current scientific and medical findings • Accepted best work practices for preventing heat exposure

Languages: Available in 2 languages

Sample Transcript

Heat stress can be caused by several factors including high temperatures, high humidity, strenuous physical activity, direct contact with hot objects, being close to radiate heat sources, and working in enclosed work areas. The next sections will cover theses in more detail.

Heat Stress Causes

Training Time: 21 minutes

Heat stress is a serious concern in many workplaces. Every year heat stress affects thousands of people, and some die as a result. This course provides the information you’ll need to “beat the heat” and keep yourself and other workers safe. You’ll learn about the different types of heat stress, from the least severe (heat rash) to the most severe (heat stroke). It will explain how the body reacts to heat, and the causes of heat stress. Finally, it will list some factors that affect how individuals tolerate heat.

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“Great video and learning tool. Quizes were definetely very helpful as well. Overall, this made our training seamless.”- Keith Lewallen - Puebo, CO

Heat index chart

The heat index attempts to express the relative heat combined with humidity

Increased circulation near skin

The body attempts to regulate heat by increasing circulation near the skin

Acclimitization

Acclimitization can help one avoid symptoms of heat stress

Learning Objectives

  • List the causes of heat stress
  • Describe how the body cools itself
  • List factors that affect the ability to tolerate heat
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Heat Stress Safety FAQs

At what temperature does a person begin to experience heat stress?
When a person’s core body temperature reaches greater than 100.4 degrees.

What are some of the forms of heat stress?
Heat rash, cramps, fainting, exhaustion, and heat stroke can all occur when a person is overheated.

How does the body cool itself?
Sweat and increased blood circulation draw heat from the body and distribute cooled blood to help lower core temperature.

What is the Heat Index?
It’s also called the Temperature-humidity index. It’s a way to combine the effects of temperature and humidity to relate how hot it actually feels. Low temperatures with high humidity can have a higher heat index than high heat without any humidity at all.

What are some physical factors that can affect heat stress safety?
Age, weight, physical fitness, and metabolism all affect a person’s ability to deal with heat.

Does alcohol or drug use make you more susceptible to heat stress?
Yes. They reduce the body’s natural ability to adjust to heat, and can cause a person to make poor decisions about the best ways to cope with heat.

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