OSHA Keeps Citing Heat Hazards Without a Final Standard

Every summer brings the same question from plant managers and contractors. Is the federal heat rule in effect yet? The answer in late 2026 is still no. That does not mean employers can wait. OSHA has extended its heat enforcement program for five more years, and the agency can cite hazardous heat conditions without a specific standard.

Where the proposed rule stands

OSHA published its proposed rule, titled Heat Injury and Illness Prevention in Outdoor and Indoor Work Settings, on August 30, 2024. It would apply across general industry, construction, maritime and agriculture. Post-hearing comments closed on October 30, 2025.

Since then, progress has stalled. Compliance trackers report that the Labor Department's regulatory agenda lists no date for final action. One tracker reported that the department's July 2026 regulatory plan targets a supplemental proposed rule for December 2026 rather than a final rule. Either way, an enforceable federal heat standard is not expected soon.

If finalized as proposed, the rule would require a written heat injury and illness prevention plan, monitoring of workplace heat, and controls at two trigger levels, an initial trigger at a heat index of 80 degrees Fahrenheit and a high heat trigger at 90 degrees. It would also require water, rest breaks, shade or cooling areas, acclimatization for new workers and training.

Enforcement continues

The more immediate factor for employers is OSHA's National Emphasis Program on heat. The original program was set to expire in April 2026. On April 10, 2026, OSHA issued a revised program that remains in effect through April 2031, according to law firm Beveridge and Diamond and other trackers.

The revised program lists 55 high-risk industries, according to Safety and Health Magazine, and describes how inspectors will evaluate heat illness prevention programs. It removed a former numerical inspection goal but keeps heat as an enforcement focus on days with heat advisories.

Without a specific standard, OSHA relies on the general duty clause of the Occupational Safety and Health Act, which requires employers to provide a workplace free from recognized hazards likely to cause death or serious harm. Excessive heat is a recognized hazard, and OSHA has issued general duty citations in heat-related cases.

States are moving faster

Several states have adopted their own heat standards. Maryland's standard covering indoor and outdoor workers took effect in September 2024 and requires a heat illness prevention plan similar to OSHA's proposal. Other states are developing rules. Kentucky has not adopted a state heat standard, but multistate employers should review requirements in every location.

Heat inspections can also lead inspectors to other issues. An OSHA visit prompted by a heat complaint may result in citations for unrelated hazards the inspector observes on site, including recordkeeping, fall protection or machine guarding problems. A strong heat program protects workers and reduces the chance that a single complaint opens the door to a broader inspection.

Who faces the most risk

Construction, roofing, landscaping, agriculture, warehousing, manufacturing with furnaces or ovens, commercial kitchens and delivery work all expose employees to dangerous heat. New workers are at particular risk. Workers who are not acclimatized to heat are far more vulnerable in their first days on the job, which matters for industries hiring large numbers of new or seasonal employees, as we describe in our construction workforce report.

Building a plan now

Safety advisers recommend that employers act as if the proposed rule were already in effect. Write a heat illness prevention plan that names a responsible person. Monitor the heat index on site, not only the forecast. Provide cool water, shaded or air conditioned rest areas and scheduled breaks that increase as the temperature rises.

Build an acclimatization schedule for new and returning workers that gradually increases exposure over the first week or two. Train supervisors and employees to recognize heat exhaustion and heat stroke and to respond immediately. Establish emergency procedures, including how to reach medical help from remote job sites.

Keep records of training, monitoring and breaks. If an inspector arrives on a hot day, documentation that the plan is actually followed matters as much as the plan itself.

Heat safety is also a retention issue. Workers who feel unsafe in summer heat often leave for jobs in climate controlled settings, a pattern that worsens the skilled trades shortage. Employers using staffing agencies should clarify who handles heat training, since agencies and host employers share responsibility, as noted in our temp staffing report.