Managing Heat Stress and Working In Hot Environments

ACPA and Travelers Insurance
Created: July 21, 2011

Heat and hot environments can pose multiple safety and health issues. Know what they are, how to treat them and how to prevent them.

Personal Protective Clothing

Air cooled or water cooled garments.
Air supplied hoods and suits can be adapted to provide cooled air.
Wetted head bands and other overgarments.

Measurement of Heat Stress
Heat stress is measured using the Wet Bulb Globe Thermometer (WBGT). The ACGIH has TLVs to assist in interpreting these measurements that establish a work rest routine appropriate for the type of work being done.

Evaluation strategy

Identify the work type
Determine current work/rest regimen
Collect WBGT data
Use WBGT index to evaluate
Make necessary adjustments

Summary

Educate
Identify workers at risk
Monitor environment and make adjustments
Provide PPE, water, rest and first aid as required

In a changing work environment, the best approach is good employee education and management controls.

References

National Safety Council. Fundamentals of Industrial Hygiene – Third Edition, 1988

AIHA Press. Occupational Environment 0 Its Evaluation of Control – Chapter 25 Thermal Standards and Measurement Techniques, 1997

American Conference of Governmental Industrial Hygienists. "Threshold Limit Value – Heat Stress," 2001

The information provided in this document is intended for use as a guideline and is not intended as, nor does it constitute, legal or professional advice. Travelers does not warrant that adherence to, or compliance with, any recommendations, best practices, checklists, or guidelines will result in a particular outcome. In no event will Travelers or any of its subsidiaries or affiliates be liable in tort or in contract to anyone who has access to or uses this information. Travelers does not warrant that the information in this document constitutes a complete and finite list of each and every item or procedure related to the topics or issues referenced herein. Furthermore, federal, state or local laws, regulations, standards or codes may change from time to time and the read should always refer to the most current requirements. This material does not amend, or otherwise affect, the provisions or coverages of any insurance policy or bond issued by Travelers, nor is it a representation that coverage does or does not exist for any particular claim or loss under any such policy or bond. Coverage depends on the facts and circumstances involved in the claim or loss, all applicable policy or bond provisions, and any applicable law.