No federal workplace heat standard — a proposed rule for 36 million workers has stalled for two years

What is happening?

The United States has no federal occupational safety standard for heat. OSHA published a proposed Heat Injury and Illness Prevention rule in the Federal Register on 2024-08-30, one that would cover roughly 36 million workers indoors and outdoors. Two years later it is still a proposal.

The record is closed. The first comment period ended 2025-01-14, an informal public hearing ran 2025-06-16 through 2025-07-02, and the post-hearing comment period ended 2025-10-30. As of April 2026 no further step toward a final rule had been taken and the federal regulatory agenda carried no target date for final action.

Meanwhile the harm keeps being counted. 48 workers died from exposure to environmental heat in 2024, and about half of those deaths were among construction workers. In the absence of a standard OSHA cites heat under the General Duty Clause, Section 5(a)(1) of the Occupational Safety and Health Act — a general-purpose provision that requires the agency to prove, case by case, that the hazard was recognized and that abatement was feasible.

Whose problem is this?

The body that would have to finish the rule is the same body that already put on the record that the rule is needed. Nothing outside that body can make it finish, and the cost of not finishing lands on people who are not in the room.

Where does this problem end?

The boundary matters here because the hazard is not disputed and the remedy has already been drafted. What is missing is not knowledge and not a proposal but a signature and an effective date.

What is the state now, and what should it be?

Now

Needs a new measurementthe target state: no source opened here gives an official target date for a final rule, nor an official target for how far heat fatalities are meant to fall. The proposal itself describes the intended floor — a written prevention plan, drinking water, shade or cooling, paid rest breaks and an acclimatization period for new workers — but every source is silent on when that floor becomes binding.

How big is it?

About 36 million workers. That is the figure OSHA published when it announced the proposal on 2024-07-02, covering indoor and outdoor settings across construction, maritime, agriculture and general industry. It has not been restated by any later source opened here.

This number counts workers who would gain a federal floor, not workers who are harmed in any single year. The annual harm is smaller and separately counted: 48 deaths from environmental heat in 2024, with roughly half of them in construction, and about 7,100 nonfatal cases across 2023 and 2024 involving days away from work, restricted duty or a job transfer.

The two quantities answer different questions. The first says how many people are standing in an unregulated space, and the second says how many of them were injured badly enough that year to enter a federal count.

Under what conditions does it arise?

1. The hazard is recognized but not codified. Because heat has no standard of its own, OSHA must reach it through the General Duty Clause, which puts the burden on the agency to establish recognition and feasible abatement in each individual case. Between April 2022 and December 2024 the agency ran roughly 7,000 heat inspections and issued 60 General Duty Clause citations, alongside 1,392 hazard alert letters and the removal of nearly 1,400 workers from hazardous heat.

2. Rulemaking has no clock. The proposal passed through a hearing and two comment periods and then stopped. Nothing in the rulemaking process forces a next step, and the regulatory agenda that would name a deadline carries no date. Two bills in the 119th Congress would remove the option altogether by barring the Secretary of Labor from finalizing this standard or any substantially similar one.

3. The cost is concentrated and the benefit is counterfactual. Employers can price a prevention plan to the dollar. The workers who would not die cannot be named in advance, so their side of the ledger enters the debate as an estimate while the other side enters as an invoice.

4. States can fill the gap, but only inside their own borders. Six or seven have. The rest of the country falls back on a clause that was never written with heat in mind.

What has been tried?

Two directions were tried at once — write the standard, and enforce harder without one. The second has run for four years and the first has not finished. A third direction now runs against both, in the form of bills that would forbid the standard outright.

What was found?

Why is it still unsolved?

Institutional gap — the rule that would close it has already been written, and nothing in the system obliges anyone to finish it.

A general clause can punish a bad employer after the fact, but it cannot tell a good one what to do beforehand. That is the whole difference between the instrument in use and the instrument in draft. Under Section 5(a)(1) the agency has to reconstruct, for each employer it cites, that the hazard was recognized in that industry and that a feasible abatement existed. Sixty citations out of roughly seven thousand inspections is what that burden costs in practice. A standard would replace the reconstruction with a number on a thermometer.

The second part of the gap is that a proposal is not a promise. The administrative record was completed in October 2025 and then the file simply sat. There is no statutory deadline attached to this rulemaking, no court order compelling a date, and no entry in the regulatory agenda naming one. An agency that stops is indistinguishable from an agency that is still working, because the public record looks the same either way.

The third part, which is the one that keeps the pattern stable, is that the delay is not visible as an event. Nobody announces that a rule has been abandoned. The proposal stays on the Unified Agenda, the emphasis program gets renewed, inspections continue, and every year a fresh count of deaths arrives with nothing in the process having changed. A gap that produces no headline produces no deadline either.

What observation would mean it is solved?

Candidates — (a) OSHA publishes a final heat standard in the Federal Register with a stated effective date (b) the annual federal count of worker deaths from environmental heat falls for several consecutive years (c) the share of workers covered by an enforceable heat standard, federal or state, rises toward the full workforce.

(a) alone is weaker than it looks. A final rule can arrive with exemptions wide enough, a trigger high enough, or an effective date distant enough that the exposure does not move. A rule can also be vacated in litigation or withdrawn by a later administration, which turns a solved observation back into an unsolved one without anything happening on a worksite.

(b) alone is worse. Annual heat fatality counts move with the weather. A mild summer lowers them and a severe one raises them, independently of any rule. The counts are also known to be incomplete — OSHA said of the reportable events it cited that the figures likely undercount actual injuries and fatalities — so a fall could equally mean fewer deaths or fewer of them being attributed to heat.

(c) alone counts paper. Coverage on paper is not the same as water, shade and rest reaching the person doing the work. Sixty citations across seven thousand inspections shows how thin enforcement can run even where the legal authority already exists. The three have to be read together, and (b) has to be read against the summer it came from.

What is it connected to?

Fills with researchclimate adaptation policy, agricultural and immigrant labor protection, the litigation environment for federal agency rulemaking after recent Supreme Court decisions, and the same standard-setting gap in other countries. Relation type and evidence grade were not confirmed in this round.

What these sources do not say

• Why the rulemaking stopped. Not one source opened here carries an on-the-record reason from OSHA, the Department of Labor or the regulatory review office. Sources describe the halt and its date; none quotes anyone explaining it.
• How many of the 36 million already have a state standard. That subtraction is the number that would say how large the federal gap actually is, and no source opened here performs it. State employment totals cannot substitute, because the state rules differ in scope — Colorado covers agriculture only. Even the count of states is unsettled: two opened sources list seven and include Minnesota, a third lists six and never mentions Minnesota, and none of the three describes what the Minnesota rule covers.
• How badly heat deaths are undercounted. OSHA said the reportable events it cited likely undercount, and stopped there. Nothing opened here estimates the size of the shortfall or explains how a heat death gets recorded as something else.
• What became of the 60 General Duty Clause citations. Whether they were contested, upheld, reduced in a settlement or vacated is absent from every source opened here — and that outcome is the actual measure of whether the general clause works for heat.
• Why the long-run totals disagree. One opened source counts 986 heat deaths between 1992 and 2022 and another counts 1,042 over the same span. Neither acknowledges the other, and neither states its counting basis.
• The 2025 count. No source opened here gives a heat fatality figure for 2025, so the most recent year available is 2024.
• What the revised emphasis program changes. The 2026 directive removed numerical inspection targets in favor of data-driven deployment. Nothing opened here says what that does to the number of inspections actually conducted.

See the evidence

No primary rulemaking document was read in full. The OSHA rulemaking page and the OSHA news release were opened directly and carry the milestone dates and the 36 million figure. The two congressional bill texts were read in full and are the only primary federal documents here read end to end; both cite the proposed standard at 89 Fed. Reg. 70698, which independently corroborates the 2024-08-30 publication date. What those two texts do not supply is a reason the agency stopped — the findings in S.4427 say why some members of Congress object to the rule, which is a different thing. Everything else comes from professional and trade sources that cite the Federal Register notice, the BLS census and the emphasis program directive. Where sources overlap they agree: the 80 and 90 degree triggers appear identically in two opened sources, the revised directive date of 2026-04-10 appears in two, and the finding of no target date for final action appears in three. Where they disagree the disagreement is left visible rather than resolved — the long-run death toll for 1992 through 2022 is given as 986 by one source and 1,042 by another, the count of states with enforceable standards is six in one and seven in two others depending on whether Minnesota is included, with no opened source describing what the Minnesota rule covers, and one source gives 55 heat deaths for 2023 while another gives 48 for 2024, with neither stating whether the two figures rest on the same count. This is a Path A output (research-based definition), so observation_refs is empty and provenance_mode: press-derived.

People affected

Estimated range 36,000,000–36,000,000 As of 2024-07-02

Sensitivity The interval has zero width and is not a confidence interval. It is a single published point estimate from the agency that proposed the rule, and no source opened here restates it, updates it or attaches a margin to it. Two corrections would move it in opposite directions and neither could be computed from the sources opened: downward, because six or seven states already enforce heat standards of their own and some of those workers sit inside the 36 million, though the state rules differ widely in scope — Colorado covers agriculture only — and the opened sources do not even agree on how many states qualify, listing six or seven depending on whether Minnesota is included; upward, because the count is limited to workers under OSHA jurisdiction and the boundaries of that jurisdiction were not mapped in this round. The count also measures exposure to an unregulated condition, not annual harm. The harm counted separately for 2024 was 48 deaths from environmental heat and about 7,100 nonfatal cases across 2023 and 2024, which are roughly four to six orders of magnitude smaller and answer a different question.

Regional breakdown No source opened here gives a state-by-state count of workers exposed to hazardous heat, or of workers already covered by a state standard. The only national figure is a single number for the whole country. Splitting it by state population would be proportional allocation, and heat exposure is concentrated in outdoor and hot indoor work rather than distributed with population, so that split would be wrong in both directions at once.