Compliance Snapshot
- Outdoor standard
- Applies to outdoor places of employment
- Indoor standard
- Applies to many indoor workplaces at 82F or higher
- Training timing
- Before reasonably anticipated heat exposure
- Plan
- Written procedures are required
Who needs heat illness prevention training?
California has long-standing outdoor heat illness prevention rules and newer indoor heat requirements for many workplaces where temperatures reach 82 degrees Fahrenheit. Employers can be covered by both standards if they have indoor and outdoor heat exposures.
Training should not wait until the first extreme heat day. Workers and supervisors need the plan, symptoms, water, rest, shade or cool-down procedures, emergency response, and acclimatization expectations before risky work begins.
What should employers put on the calendar?
A good operational deadline is before the hot season, before new hot-work assignments, and before any indoor process or location crosses the standard's temperature triggers. Refresher training should be used when procedures change or employees need reinforcement.
Daily or shift-level reminders can support training but should not replace documented training on the employer's written procedures.
Where National Course Portal fits
The Heat Illness Prevention course can provide a documented awareness baseline for employees and supervisors.
Employers still need a written heat illness prevention plan, site-specific water and rest procedures, emergency response steps, supervisor duties, and any California indoor or outdoor standard details that apply to the workplace.
Employer Checklist
- 1Determine whether outdoor, indoor, or both heat standards apply.
- 2Create or update written heat illness prevention procedures.
- 3Train supervisors and nonsupervisory employees before risky heat work.
- 4Cover water, rest, shade or cool-down areas, symptoms, and emergency response.
- 5Document completion dates and training content.
- 6Refresh training before the hot season and when procedures change.
FAQ
When is California heat illness prevention training due?
Training should be provided before employees begin work that should reasonably be anticipated to expose them to heat illness risk.
Does California have indoor heat rules?
Yes. California's indoor heat illness prevention standard went into effect in 2024 and applies to many workplaces when indoor temperature reaches 82 degrees Fahrenheit.
Does online training replace a heat illness prevention plan?
No. Online training can support awareness, but employers still need written, workplace-specific heat illness prevention procedures.
Official Sources
- Cal/OSHA: Heat illness prevention guidance
- Cal/OSHA: Outdoor heat illness prevention
- Cal/OSHA: Training elements
This guide is general information for employer planning. It is not legal advice, and employers should confirm requirements with counsel, the regulator, or the requesting agency before relying on any course for a specific obligation.