Is There a Federal OSHA Heat Standard?
No. As of July 2026 there is no specific federal OSHA heat standard in effect. OSHA proposed one in August 2024, but the rule has not been finalized and has no target date. Federal OSHA still enforces heat hazards through the General Duty Clause, section 5(a)(1) of the OSH Act, and inspects proactively under the renewed National Emphasis Program on heat (CPL 03-00-024, effective through April 2031). Five states have gone further and require a written heat illness prevention plan.
How OSHA cites heat without a heat standard
The General Duty Clause requires employers to keep the workplace free of recognized hazards likely to cause death or serious harm. Heat qualifies: it is well recognized, and the abatement methods (water, rest, shade, acclimatization, training) are feasible. Under the Heat NEP, OSHA does not wait for a complaint. Inspectors open heat inquiries during other programmed inspections when conditions warrant it, outdoor work at an 80°F heat index gets attention, and days above 90°F draw the most scrutiny.
What happened to the proposed federal rule
OSHA published the proposed Heat Injury and Illness Prevention standard on August 30, 2024. Hearings ran through 2025 and the post-hearing comment period closed in October 2025, but no final action has been scheduled since. In the meantime OSHA renewed the enforcement program instead: the revised Heat NEP took effect in April 2026 and runs through April 2031, which tells you where the enforcement energy is going.
Where a written heat plan is already the law
Five states require contractors to have a written heat illness prevention plan, each with its own trigger:
| State | Rule | Trigger | Written plan |
|---|---|---|---|
| California | 8 CCR 3395 (outdoor) and 8 CCR 3396 (indoor) | 80°F outdoors, 82°F indoors | Yes |
| Oregon | OAR 437-002-0156 | 80°F heat index | Yes |
| Washington | WAC 296-62-095 | 80°F, year-round rule | Yes |
| Nevada | R131-24 (NAC ch. 618) | Hazard-based, more than 10 employees | Yes |
| Maryland | COMAR 09.12.32 | 80°F heat index | Yes |
What to do if you work in the other 45 states
A written plan is not federally mandated, but it is the abatement evidence that answers a General Duty Clause citation, and GCs increasingly require one in summer months regardless of state. TailgateDocs generates a Heat Illness Prevention Plan matched to your state for $49, with the correct triggers and citations for the five rule states and a NEP-aligned plan everywhere else, delivered in about 4 minutes.
Common questions
▸Can OSHA really fine me for heat if there is no heat standard?
Yes. General Duty Clause citations for heat are established practice, and the Heat NEP directs inspectors to look for heat hazards proactively. The employers who lose those cases are the ones with no water, rest, shade, acclimatization, or training program to point to.
▸Does the Heat NEP apply to construction?
Yes. The NEP covers outdoor and indoor heat hazards across industries, and construction is one of its priority targets because of the exposure hours involved.
▸When will the federal heat rule be final?
There is no announced date. The comment record closed in late 2025 and the rule has not moved since, while the enforcement program was renewed through 2031. Plan around the NEP and your state rule, not the pending standard.
Official sources
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