Heat Stress Video and DVD reviews how heat effects the body, the steps that employees can take to prevent Heat Stress, and elementary first aid that can be given to a worker who has been affected by a heat-related illness. Each year thousands of employees suffer the adverse effects of Heat Stress. Whether they work outdoors under the hot summer sun, or indoors with equipment and machinery that give off high levels of heat, these employees need to know how to recognize and prevent Heat Stress and other heat-related health problems.