OSHA heat rules: what applies to your crew today

Last checked: November 5, 2026. Rule status changes. This page is general information, not legal advice. Ask a safety professional or an attorney about your own duties.

Does OSHA have a heat standard?

No. As of November 2026, there is no final federal OSHA heat standard. OSHA has a proposed rule, and the rulemaking is still open. Until a final rule exists, OSHA enforces heat hazards with two tools: the General Duty Clause and the Heat National Emphasis Program.

That means no one can say “OSHA requires” a specific water-break schedule or temperature trigger today. The proposal is not law. But employers still owe crews a workplace free from heat hazards, and OSHA does inspect for them.

What is the General Duty Clause for heat?

It is the part of the law OSHA uses when no specific standard applies. OSHA says federal OSHA has a General Duty Clause (Section 5[a][1] of the Occupational Safety and Health Act of 1970). It requires employers to provide a place of employment “free from recognized hazards that are causing or are likely to cause death or serious physical harm to employees.”

Heat is a recognized hazard. NIOSH, the National Weather Service and OSHA all publish guidance on it. OSHA also says it uses WBGT to decide whether a heat hazard was present.

OSHA encourages water, rest, and shade as prevention. A written plan with those three parts is the clearest sign that you control the hazard. See our heat stress prevention pillar and the OSHA heat illness prevention guide.

What is the Heat National Emphasis Program?

It is OSHA’s inspection program for heat. OSHA revised it on April 10, 2026. The revised program took effect right away and stays in place for five years. It uses OSHA and Bureau of Labor Statistics data from 2022 through 2025 to direct inspection priorities to 55 high-risk industries in indoor and outdoor work.

Three details matter for a safety manager:

1. Random heat inspections. On days when the National Weather Service issues a heat advisory or warning, compliance officers conduct random inspections focused on heat hazards in high-risk industries.
2. No numeric inspection goal. OSHA’s release says the revision removes the former numerical inspection goal.
3. Free help. OSHA’s On-Site Consultation Program is free and confidential for small and medium businesses. It can help you build a heat approach.

Read the details in our post on the 2026 heat emphasis program. The glossary entry on the OSHA heat NEP is short.

How does OSHA decide a heat hazard exists?

OSHA looks at the conditions and at what the employer did about them. OSHA says it uses WBGT to determine if a heat hazard was present. The Heat National Emphasis Program also has an appendix for evaluating heat programs and another for citation guidance, which OSHA says it reorganized in the April 2026 revision.

So an inspector may ask four plain questions:

1. What were the heat conditions, measured by WBGT or the heat index?
2. Did the crew have water, rest and shade?
3. Were new and returning workers acclimatized?
4. Were workers and supervisors trained, and did anyone know the emergency steps?

Your records answer these. A short daily heat log, a training sign-in sheet and a written plan are good proof.

What is the proposed OSHA heat rule, and where does it stand?

It is a proposed rule called “Heat Injury and Illness Prevention in Outdoor and Indoor Work Settings.” OSHA published it in the Federal Register on August 30, 2024. As of November 2026, no final rule is listed on OSHA’s rulemaking page.

Here is the timeline OSHA lists:

Read the OSHA heat rule entry for a plain definition. Our post on the rule status as of November 2026 tracks changes. We will update this page when OSHA acts.

Do not write “OSHA requires” for anything in the proposal. It is a proposal. Plan around it if you like, but know it can change before it is final.

What does “proposed” mean in plain words?

A proposed rule is a draft the public can comment on. It is not law until the agency publishes a final version. The table shows the difference.

So when a vendor, a news story or a training slide says “OSHA requires” a break every hour or a temperature trigger, ask for the citation. If it points to the proposal, it is not a requirement today. The honest line is: “OSHA has proposed a heat rule, and enforces heat hazards under the General Duty Clause and the Heat National Emphasis Program.”

Which states have their own heat laws?

Five. OSHA says Washington, Minnesota, California, Oregon and Colorado have specific laws governing occupational heat exposure. Texas is not on that list. Employers in those five states need to follow the state law as well as the federal tools above.

State laws change. Check your state agency before you build a plan around any number you read online, including here.

What heat rules apply in Texas?

Federal OSHA still covers Texas employers. The General Duty Clause and the Heat National Emphasis Program apply. Texas has no state heat standard on OSHA’s list. And Texas House Bill 2127, which became law in 2023, took away cities’ power to set their own water-break rules.

The Texas Tribune reported in June 2023 that Gov. Greg Abbott gave final approval to a law that eliminates local rules mandating water breaks for construction workers. The law nullifies ordinances Austin passed in 2010 and Dallas passed in 2015. Those ordinances set 10-minute breaks every four hours. The law also prevents other cities from passing such rules. It went into effect on September 1.

What stayed the same: HB 2127 is about local ordinances. It did not end federal OSHA authority. It also does not stop you from setting water and rest rules for your own crew.

For more, read Texas HB 2127, our Texas heat rules guide, and the posts on Texas heat rules after HB 2127 and Austin and Dallas water-break rules.

What can employers do now, without waiting for a final rule?

Build the plan a final rule would likely ask for anyway. NIOSH, OSHA and the National Weather Service already agree on the basics, and none of them depends on the rulemaking.

1. Write a heat plan. Name an owner, set water, rest and shade rules, and write the emergency step. Use our heat stress program for employers.
2. Acclimatize workers. NIOSH sets a schedule for new and experienced workers. See the acclimatization schedule.
3. Use a heat measure. Pick the heat index or WBGT and set break rules by level. See WBGT vs heat index.
4. Train every supervisor. Run a toolbox talk each week of hot season. Use the heat toolbox talk kit.
5. Keep records. Note who was trained, when, and what the plan said that day.
6. Plan for heat stroke. It is an emergency. Call 911.
7. Ask OSHA for help. The On-Site Consultation Program is free and confidential for small and medium businesses.

Hydration is one part of this plan. JMAR’s Rapid Restoration Drops are a dietary supplement that replaces electrolytes lost in sweat and supports hydration. They do not replace shade, rest, training or medical care. See the hydration programs and the liquid electrolyte drops pillar.

What would change if OSHA finalizes the rule?

We do not know. OSHA has not published a final rule, and no specific changes have been announced. A final rule could add specific duties that today are only guidance. It could also change or drop parts of the proposal. Do not plan around a number you read in a news story.

What you can do is build habits that fit any outcome: a written plan, acclimatization, training, water, rest and shade, and clear emergency steps. If a final rule arrives, you adjust a working program instead of starting from zero.

Where do I check the latest status?

Go to the source. These pages are the ones we used, and they are the first to change:

See also the General Duty Clause, NIOSH and on-site consultation entries in the glossary.

What should I tell my crew about the rules?

Keep it simple and true. Tell them that the company has a heat plan, that water, rest and shade are part of it, and that anyone can stop and report a sign of heat illness. Tell them heat stroke means 911. You do not need to quote a rule number to run a safe crew.

Tell supervisors a little more: OSHA can inspect for heat, more often on hot days, and the written plan and training records are what you show. Our heat illness pillar gives the signs and first steps for the talk.

When did this page last change?

Last checked: November 5, 2026. Checked against OSHA’s heat overview, OSHA’s rulemaking page, OSHA’s April 10, 2026 news release, the Texas Tribune and ARTBA.

Next step

Book a free 15-minute demo with JMAR at calendly.com/jen-jmarsolutions/15-min-meeting. You can also ask for a free sample or request bulk and government pricing.