OSHA Heat Rules in 2026: The Standard Stalled but the Inspections Didn't

Chris Fredette
Jun 17
5 min read

Construction employs about six percent of the American workforce and accounts for roughly a third of all occupational heat deaths. That ratio has held for three decades. And heading into the summer of 2026, the regulatory picture around it is genuinely confusing: the federal heat standard everyone has been tracking since 2024 still is not finished, but OSHA just renewed its heat enforcement program for five more years. If you manage outdoor work, both halves of that sentence should shape your next ninety days.

Here is where things actually stand, what changed in April, and what your heat program needs to hold up this summer.

By the Numbers

986 workers died from environmental heat exposure on the job between 1992 and 2022, an average of 34 deaths per year, according to the BLS Census of Fatal Occupational Injuries.
334 of those deaths were construction workers. That is about 34 percent of all occupational heat fatalities from an industry that employs roughly 6 percent of the workforce.
BLS itself calls those figures likely vast underestimates, because heat illness gets misdiagnosed, miscoded, and underreported.
Cement masons, roofers, and laborers carry the highest heat fatality risk in construction. One CDC-published study put cement masons at nearly 11 times the industry average.
Heat-related inspections made up 6 percent of all federal OSHA inspections over the past five years, up from half a percent before the 2022 emphasis program.
Seven states already enforce their own heat illness prevention standards: California, Colorado, Maryland, Minnesota, Nevada, Oregon, and Washington.

Where the Federal Heat Standard Actually Stands

OSHA published its proposed Heat Injury and Illness Prevention rule in August 2024. The proposal covers construction, general industry, maritime, and agriculture, and it is built around two trigger points: an initial heat trigger at an 80 degree Fahrenheit heat index, where employers would need to provide drinking water, break areas, and acclimatization protocols, and a high heat trigger at 90 degrees, where mandatory rest breaks and observation requirements kick in.

Since then the rulemaking has crawled. Public hearings wrapped up on July 2, 2025. The post-hearing comment period closed on October 30, 2025. As of this writing, OSHA has announced no target date for a final rule, and most observers do not expect one to land soon.

The practical read for contractors: do not build your 2026 heat program around waiting for a federal standard, and do not assume the absence of one protects you. It does not, and the next section is why.

The April 2026 Heat NEP: Five More Years of Inspections

On April 10, 2026, two days after the original heat National Emphasis Program expired, OSHA issued a revised version: CPL 03-00-024, the NEP on Outdoor and Indoor Heat-Related Hazards. It took effect immediately and stays in place for five years. The agency used its own inspection data plus BLS data from 2022 through 2025 to build a target list of 55 high-hazard industries, and construction trades are on it.

The updated directive also reorganized its citation guidance and added a framework inspectors use to evaluate an employer's heat program. Translation: when a compliance officer shows up on a hot day, they are working from a checklist. They will ask for a written heat illness prevention plan, acclimatization procedures for new and returning workers, documented supervisor and worker training, records showing you actually monitor temperature or heat index, and evidence that water and rest breaks happen in practice, not just on paper.

An emphasis program is not a standard, but on the ground the difference is small. It means heat is a stated enforcement priority, inspectors can open or expand inspections around it, and a weak program gets found.

No Standard Does Not Mean No Citations

OSHA has been citing heat hazards for years without a heat standard, using Section 5(a)(1) of the OSH Act, the General Duty Clause. Those citations usually follow a hospitalization or a fatality, which is exactly the wrong time to discover your program does not hold up. The agency ran roughly 7,000 heat-related inspections between April 2022 and December 2024 under the original emphasis program alone.

Then there are the states. California, Colorado, Maryland, Minnesota, Nevada, Oregon, and Washington all enforce their own heat rules right now, several covering indoor work as well. If you run crews across state lines, your program needs to meet the strictest trigger that applies, and telling a Cal/OSHA inspector that you follow federal best practice is not an answer.

What Your Heat Program Needs Before July

A defensible heat program in 2026 is written, site specific, and boring in the best way. It names the person responsible for monitoring conditions each day. It sets trigger temperatures in writing, and the smart move is 80 and 90 degrees heat index, because those numbers mirror both the federal proposal and most state standards. It spells out water at about a quart per worker per hour, shade or a cooled break area close enough to the work that crews actually use it, and a rest schedule that scales as the heat index climbs.

Acclimatization deserves its own line because it is where people die. A large share of heat fatalities hit workers in their first week on the job or their first week back after time away. New hires and returning workers need a ramped schedule, and supervisors need to know who on the crew is in that window on any given day.

Then document everything. Training rosters, daily heat index readings, break logs on high heat days, the plan review date. In an inspection, an undocumented program is treated like no program at all.

Key Takeaways

The federal heat standard is still not final and has no announced timeline, so do not plan your summer around it.
OSHA renewed heat enforcement for five more years on April 10, 2026, which makes inspections the operating reality through at least 2031.
The General Duty Clause and seven state heat standards already give regulators everything they need to cite a weak program today.
Build around an 80 degree initial trigger and a 90 degree high heat trigger, because those numbers align with the federal proposal and most state rules.
Write the plan, run the plan, and document the plan, because paperwork is what proves the program existed when someone asks.

Heat is the one hazard that shows up on the schedule every single summer, and this year the agencies have told you exactly what they will look for. If you need a site-specific heat illness prevention program built and ready before the first 95 degree week, that is exactly the kind of work TriCore Safety does. Reach out through tricoresafety.com.