On April 10, 2026, the Occupational Safety and Health Administration (OSHA) issued an updated National Emphasis Program (NEP), expanding its heat illness enforcement focus to 55 high-risk industries and authorizing unannounced inspections when heat advisories are in effect. A heat advisory is an official notice from the National Weather Service indicating that temperature and humidity have reached a level that poses a real health risk. Warehousing and manufacturing are both explicitly included.
This program gives OSHA inspectors authority to enter targeted workplaces without a complaint or incident trigger. If your operation is in a targeted industry and the heat index, a measure combining temperature and humidity to reflect how hot conditions feel, crosses 80 degrees Fahrenheit, your facility is eligible for an unannounced inspection. The program runs through 2031.
For operations that have coasted on informal practices (a cooler by the exit, break room water available only if workers walked back), this update closes that window.
The warehouse hydration and heat safety guide covers the full framework for building hydration infrastructure in an industrial facility.
What the NEP Targets
The program covers both outdoor and indoor heat environments. The 55 targeted industries include warehousing, manufacturing, construction, agriculture, and utilities. OSHA inspectors visiting under the NEP are not limited to reviewing the condition that triggered the visit — they can examine the full heat illness prevention program.
Industries with previously documented heat illness cases carry higher risk of inspection under the program. OSHA's enforcement data is public. Operations in the targeted industries in high-heat states — Arizona, Texas, Oklahoma, Tennessee, and Indiana — face concentrated exposure during summer months.
What OSHA Inspectors Look For
A heat illness inspection under the General Duty Clause and the NEP evaluates whether the employer identified the heat hazard and implemented effective controls. OSHA's heat exposure guidance identifies three core controls: water, rest, and shade.
Water is the most documented requirement. OSHA's guidance specifies cool drinking water accessible to workers without requiring them to leave the work area, at approximately one quart per hour per worker in extreme heat. On a production floor with 50 workers running a summer shift, that is 50 quarts per hour (12.5 gallons). The capacity and placement of the water dispensing equipment matters.
Rest means scheduled breaks in a cool or shaded area, with adequate duration and frequency tied to the heat index and workload. A written schedule linked to heat advisory levels is stronger documentation than a general policy that breaks are allowed.
Training documentation shows that supervisors and workers received heat illness awareness instruction covering symptom recognition, first aid procedures, and when to stop working.
An inspector who finds no written plan, no documented training, and water access only in the break room has a documented deficiency across all three areas.
What a Written Heat Illness Prevention Plan Must Include
OSHA does not prescribe a specific format, but the content needs to address:
- The specific heat hazards present in the workplace, including whether conditions are indoor, outdoor, or both, and the work tasks involved
- Acclimatization procedures for new workers and workers returning from extended absence
- Water, rest, and shade provisions with specifics: quantity, placement, and frequency
- Training program for supervisors and workers, with documentation of completion
- Emergency response procedures when a worker shows heat illness symptoms
- Monitoring and adjustment procedures tied to daily heat advisory levels
A plan that addresses these elements in writing, with signatures showing training was completed, is defensible. A verbal policy is not.
How On-Floor Water and Ice Access Fits the Documentation
The placement of water dispensing equipment is not a secondary detail in a heat inspection — it is a core element of the documented control. A water access point in the break room does not satisfy OSHA's guidance if reaching it requires workers to exit the production floor.
The 100-foot placement standard, meaning no more than 100 feet from any worker's position to the nearest water station, is the operational benchmark for adequate access on a manufacturing or warehouse floor. Floor-standing water and ice combination units placed at zone intervals satisfy this standard and create a permanent, plumbed installation that an inspector can observe in place.
The equipment is also auditable. A service agreement that documents scheduled sanitation and maintenance visits for each unit shows the hydration infrastructure is actively maintained, not just present. That documentation supports the broader heat illness prevention plan.
For operations in high-heat markets, water access on the floor is a compliance control that needs to be documented, maintained, and distributed across the facility.
Frequently Asked Questions
Which industries are covered by OSHA's 2026 heat NEP?
OSHA Directive CPL 03-00-024 covers 55 high-risk industries including warehousing, manufacturing, construction, agriculture, landscaping, utilities, and food processing. The directive covers both outdoor and indoor heat environments. Review the full industry list at osha.gov/heat-exposure to confirm whether your operation is included.
Can OSHA inspect without a complaint or incident?
Under the NEP, yes. OSHA inspectors are authorized to conduct proactive inspections of targeted industries when heat advisories are in effect. An incident or complaint is not required. Operations in targeted industries in high-heat states should operate on the assumption that an inspection is possible on any heat advisory day.
What are the financial consequences of failing a heat illness inspection?
OSHA can issue a citation under the General Duty Clause for failing to address a recognized hazard. Penalties for serious violations can reach $16,550 per violation under current guidelines, with repeat violations reaching $165,514. Operations with documented heat illness incidents before an inspection face higher citation severity.
Does a water cooler in the break room satisfy OSHA's water requirement?
Not for production floor workers. OSHA's guidance specifies water accessible without requiring workers to leave their work area. A break room water source satisfies the requirement only for workers already in or near that area. For production floor operations, this means water stations distributed within 100 feet of each worker's position on the floor.
What should an operation do if it lacks a written heat illness prevention plan?
Write one before inspection season. Start with the elements listed above — hazard identification, acclimatization procedures, water and rest specifics, training records, and emergency response procedures. An incomplete written plan demonstrates employer engagement with the requirement. No written plan demonstrates the opposite. OSHA's free compliance assistance consultants can review draft plans without citation risk.