State Regulations8 min readJanuary 2026
California vs Federal OSHA Heat Rules: Key Differences Explained
Operating in multiple states? Here is how California's rules stack up against the proposed Federal standard.
Stricter State Requirements
California is generally stricter than the federal proposal.
Trigger Temps
- Federal: 80°F heat index
- CA: 80°F ambient temperature (dry bulb)
This distinction matters. Heat index is higher than dry bulb in humid conditions, but dry bulb is simpler to measure.
High Heat
- Federal: 90°F heat index
- CA: 95°F ambient temperature
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