California indoor heat standard takes effect
California's indoor heat standard took effect July 23, 2024 for most indoor workplaces. Requirements generally begin at 82°F, with additional assessment and control triggers at 87°F and under specified 82°F conditions.
Applicability depends on the standard's exceptions and trigger conditions. The temperature thresholds do not describe all duties.
- Legal status
- Effective
- Source check
- Sep 17, 2026
- Topic
- Heat stress
- Technical review
- Jiaxi · 2026-09-23
What changed
Previous requirement
Existing outdoor heat and general safety duties; no full historical baseline audit.
New requirement or current position
Indoor heat requirements generally begin at 82 F; additional assessment/control triggers include 87 F and specified 82 F conditions.
Who it affects
- Manufacturing
- Warehouses
- Indoor workplaces
Dates and milestones
Commencement and compliance dates can differ. Read the conditions beside each date, including any stay or local adoption requirement.
- Announcement or publication
- Jul 23, 2024
- Recorded effective date
- Jul 23, 2024
Covered indoor workplaces
What this could mean for your IH program
Advisory interpretation: Store temperature, heat index, clothing and radiant-heat context separately. The 82 F threshold is a heat-control trigger.
Confirm applicability with a qualified practitioner before changing your program.
Questions and qualifications
- Applicability exceptions require section 3396(a) review. Thresholds are summarized in the narrative; chemical numerical_limits is empty.
Source evidence
- Title 8 section 3396: Indoor Heat
California DIR / Cal/OSHA · (a)(1)-(2); History
Indoor threshold 82 F; additional assessment/control triggers include 87 F temperature or heat index and 82 F in specified clothing or radiant-heat conditions; operative July 23, 2024.
- Indoor Heat rulemaking
California OSHSB · Status table
Filed and effective July 23, 2024.
Managing your IH program
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