OSHA recently completed a public hearing on its proposed Heat Injury and Illness Prevention Standard, and while the final rule may be months away, the direction is clear: new employer obligations for workers in heat-exposed environments are coming. If your workforce includes outdoor laborers, warehouse staff, or anyone in non-climate-controlled settings, start preparing now.
What the Proposed Standard Requires
The proposed rule would apply to all employers under OSHA jurisdiction with workers exposed to heat conditions above specified thresholds. Key requirements include developing a written heat illness prevention plan, providing accessible water and shade or cool-down areas, implementing acclimatization protocols for new and returning workers during the first one to two weeks of exposure, designating a heat safety coordinator, training workers and supervisors on heat illness symptoms and emergency response, and establishing procedures for monitoring heat conditions and adjusting work practices.
Which Industries Are Most Affected
Construction, agriculture, landscaping, warehousing, manufacturing, and transportation are the primary targets. But the standard is not limited to outdoor work. Indoor facilities without adequate cooling, including commercial kitchens, laundries, foundries, and distribution centers, are also covered if heat conditions exceed the trigger thresholds.
What You Can Do Now
Assess your exposure. Walk your facilities and job sites. Identify areas where workers are regularly exposed to heat. Measure ambient temperatures during peak conditions.
Review your current practices. Many employers already have informal heat safety measures. Document what you are doing: water availability, break schedules, cooling areas. This becomes the foundation of your written plan.
Start an acclimatization protocol. This is one of the most effective interventions and does not require waiting for a final rule. New employees and workers returning from extended absence should have a gradual ramp-up period during their first week in heat-exposed conditions.
Train your supervisors. Supervisors need to recognize heat illness symptoms (confusion, slurred speech, loss of consciousness) and know the emergency response procedure. This training should happen annually, before the hot season begins.
The Comment Period
The post-hearing comment period runs through October 30, 2025. Employers and industry groups can submit written comments on the proposed standard’s feasibility, cost, and implementation timeline. If you believe specific provisions would be impractical for your industry, this is your opportunity to provide that feedback to OSHA on the record.