Examples of work activities that are considered light, moderate, heavy, and very heavy:
|Work Rate Category||Example Motions||Example Tasks|
ACGIH, 2011. Heat Stress and Strain, in TLVs and BEIs, American Conference of Industrial Hygienists, Cincinnati, OH.
Ramsey, J and Bishop, P. 2003. Hot and Cold Environments (Chapter 24), in The Occupational Environment, its Evaluation, Control, and Management (S.R. DiNardi, Editor), American Industrial Hygiene Association. [After McArdle, Katch and Katch (1996)].
|Heat Index||Risk Level||Protective Measures|
|Less than 91°F||Lower (Caution)||Basic heat safety and planning|
|91°F to 103°F||Moderate||Implement precautions and heighten awareness|
|103°F to 115°F||High||Additional precautions to protect workers|
|Greater than 115°F||Very High to Extreme||Triggers even more aggressive protective measures|
How can OSHA help? Workers have a right to a safe workplace. If you think your job is unsafe or you have questions, contact OSHA at 1-800-321-OSHA (6742). It's confidential. We can help. If you have been punished or discriminated against for using your rights, such as raising health and safety concerns or filing a complaint, you must file a complaint with OSHA within 30 days. No form is required, but you must call or send a letter to OSHA within 30 days of the alleged discrimination. For other valuable worker protection information, such as Workers' Rights, Employer Responsibilities, and other services OSHA offers, visit OSHA's Workers' page.
OSHA also provides help to employers. OSHA's On-site Consultation Program offers free and confidential advice to small and medium-sized businesses in all states across the country, with priority given to high-hazard worksites. For more information or for additional compliance assistance contact OSHA at 1-800-321-OSHA (6742). It's confidential. We can help.
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