Heat Illness Prevention
California employers are required to take these four steps to prevent heat illness:
Train all employees and supervisors about heat illness prevention.
Provide enough fresh water so that each employee can drink at least 1 quart per hour, or four 8 ounce glasses, of water per hour, and encourage them to do so.
Provide access to shade and encourage employees to take a cool-down rest in the shade for at least 5 minutes. They should not wait until they feel sick to cool down.
Develop and implement written procedures for complying with the Cal/OSHA Heat Illness Prevention Standard.
Heat Illness Prevention Training – for Employers with Outdoor Workers
Education, Training Resources and Publications
- Webinar on Cal/OSHA Heat Illness Prevention requirements (44.35 min. duration)
- Heat Illness Prevention Training Materials 2021 (also available in → PowerPoint format* )
- Heat Illness Prevention enforcement Q&A 2018
- Cal/OSHA Consultation Services Heat Illness Prevention etool
- Employer Sample Procedures for Heat Illness Prevention (also in → MS Word )
- Health effects of Heat posters:
- Cal/OSHA guidance on the new requirements, May 14, 2015
*Not an accessible version.
- Pocket Guide: Protect Yourself from Heat Illness (English & Español)
- Heat Safety Fact Sheet (English)
- File a health & safety complaint (English)
- Additional heat illness prevention resources
More CAL/OSHA Resources:
- 99 Calor campaign page
Contains materials available for download including Heat Illness Prevention videos and discussion guides in multiple languages.
- Videos and guides available in English, Spanish, Punjabi, Hmong and Mixteco
Outreach and Education Campaign
- 99 Calor Heat Illness Prevention Campaign
- Final Performance and Evaluation Report on the Heat Illness Prevention Campaign - 2012
- Final Performance and Evaluation Report on the Heat Illness Prevention Campaign - 2010
Heat Illness Prevention Standard
Read the Heat Illness Prevention standard found in the California Code of Regulations, title 8:
Additional Heat Illness Links
- FedOSHA Quick Card: Protecting Workers from Heat Stress
- National Weather Service: California Information
- Centers for Disease Control: Heat Stress
- Centers for Disease Control: Tips for preventing heat-related illness