--- title: "Heat Stress Program for Employers: 8 Steps to Build One" description: "Build a heat stress prevention program in eight steps from OSHA and NIOSH guidance: a daily lead, heat measurement, water, rest, shade, training and 911." url: https://jmarsolutions.multisites.ai/guides/heat-stress-program-for-employers publisher: JMAR Solutions phone: +1-214-632-7780 quote: https://jmarsolutions.multisites.ai/contact --- Field guide # Build a heat stress program in 8 steps A heat stress program has eight parts: name a daily lead, measure heat on site, set advisory-day triggers, give water, rest and shade, acclimatize workers, train everyone, plan first aid and 911, then review. OSHA says employers should write the plan down. This follows OSHA and NIOSH guidance, not a final federal rule. Updated November 5, 20267 min read ## Write it down OSHA says employers should create a written plan to prevent heat-related illness. ## One daily lead Name a person on site who monitors conditions and runs the plan all day. ## Water, rest, shade OSHA encourages all three as prevention and as treatment. ## Plan the 911 call Heat stroke needs emergency care. Rehearse who calls, who cools and who stays. ## What is a heat stress program, and why write one down? A heat stress program is a written plan that finds heat hazards, sets controls and says what to do when someone gets sick. OSHA says “Employers should create a written plan to prevent heat-related illness.” A written plan turns good intent into daily habits that a new foreman can follow. OSHA also says “Heat-related illness is preventable, especially with management commitment to providing the most effective controls.” No final federal OSHA heat standard exists as of November 2026, so this guide follows OSHA and NIOSH guidance. It is not legal advice. See our [OSHA heat illness prevention guide](https://jmarsolutions.multisites.ai/guides/osha-heat-illness-prevention) for the rule status. Use the eight steps below. Together they make a [heat illness prevention plan](https://jmarsolutions.multisites.ai/glossary/heat-illness-prevention-plan) you can adapt to a site, a shift or a fleet. Step What to do Main source 1 Name a daily heat lead OSHA planning page 2 Measure heat where the work happens OSHA hazard page 3 Set triggers for heat advisory days OSHA planning, NIOSH 4 Provide water, rest and shade OSHA, NIOSH 5 Acclimatize new and returning workers OSHA, NIOSH 6 Train workers and supervisors NIOSH 7 Plan first aid and 911 OSHA, NIOSH 8 Review, record and improve OSHA ## Step 1: Who should run the heat plan each day? Name one trained person per site. OSHA says an individual at the worksite “should be responsible for monitoring conditions and implementing the employer’s heat plan throughout the workday.” That can be a foreman, jobsite supervisor, plant manager or safety director. OSHA says proper training includes knowing how to identify and control heat hazards, recognize early symptoms, give first aid and activate emergency medical services quickly. Give the lead authority to slow work and call a break. A lead who needs permission to stop work will not stop it in time. ## Step 2: How do you measure heat at the site? Use a WBGT meter near the work. OSHA says “Workplace environmental heat should be measured on-site using WBGT meters.” The heat index is a less desirable substitute. Our [WBGT vs heat index guide](https://jmarsolutions.multisites.ai/guides/wbgt-vs-heat-index) shows OSHA’s limits by workload. OSHA says employers must assess both the environment and the work. Environmental heat comes from the weather. Metabolic heat comes from the work. Heavy and very heavy tasks carry the highest risk. Record the reading, the time and the task, so you can show what you knew and when. ## Step 3: What triggers extra controls on a hot day? Set triggers in writing before summer starts. NIOSH says to use a heat alert program whenever the weather service forecasts a heat wave. OSHA’s planning page asks employers how they will respond when the National Weather Service issues a heat advisory or heat warning. Pick clear triggers, such as an NWS advisory, a WBGT limit or the first hot week of spring. Then list what changes: more breaks, earlier start times, more water stations, more buddy checks and fewer solo tasks. The OSHA Heat NEP adds random heat inspections in high-risk industries on NWS advisory or warning days, so these days matter twice. ## Step 4: How do water, rest and shade work in the program? Apply Water. Rest. Shade. every shift. OSHA says it “encourages water, rest, and shade as prevention as well as treatment for heat-related illness.” See the [Water. Rest. Shade.](https://jmarsolutions.multisites.ai/glossary/water-rest-shade) entry for the idea in short form. - **Water.** NIOSH says to provide adequate amounts of cool, potable water near the work area and encourage workers to drink often. OSHA says workers “should not rely on feeling thirsty.” - **Rest.** OSHA says rest breaks should get longer and more frequent as heat stress rises, and that skipping breaks in hot conditions is not safe. - **Shade.** OSHA says give workers “a cool location where they can take their breaks and recover from the heat.” Outdoors that can be shade, an air-conditioned vehicle, a tent, or an area with fans and misting. - **Electrolytes.** OSHA says that on jobs longer than two hours, employers “should provide electrolyte-containing beverages such as sports drinks.” NIOSH says fluid intake should not exceed 6 cups per hour. ## Step 5: How do you acclimatize new and returning workers? Ramp up exposure over days. NIOSH says to gradually increase workers’ time in hot conditions over 7 to 14 days. OSHA says almost half of heat-related deaths happen on a worker’s first day on the job or first day back after an extended absence. Use the 20 percent rule for new workers: 20 percent of normal heat exposure on day one, then add 20 percent per day. Keep the intensity of the work the same; shorten the time. Our [heat acclimatization schedule](https://jmarsolutions.multisites.ai/guides/heat-acclimatization-schedule) has a full table. Add a buddy system, which NIOSH recommends. ## Step 6: What should heat training cover? Cover signs, causes, first aid and who to tell. NIOSH says to train workers before hot outdoor work begins and to provide a heat stress training program for all workers and supervisors. Supervisors need extra training on acclimatization, emergency response, weather monitoring and fluid intake. Topics for every worker: 1. Signs and symptoms of heat-related illness, and first aid. 2. Why drinking enough and watching urine color and amount matter. 3. How clothing and PPE add heat. 4. Why acclimatization matters. 5. Report your own symptoms and a coworker’s right away. 6. How to call emergency medical services. Short toolbox talks keep the habit alive. See the [toolbox talk](https://jmarsolutions.multisites.ai/glossary/toolbox-talk) entry. JMAR Solutions also offers onsite toolbox talks as part of its hydration programs. ## Step 7: What is the first aid and 911 plan? Heat stroke is a 911 emergency. NIOSH says: “Call 911 for emergency medical care.” Move the worker to a cool area, remove outer clothing, cool the worker fast, and stay until emergency medical services arrive. OSHA adds: “When in doubt, cool the worker and call 911.” Write the plan on one card per site: 1. Who calls 911 and who meets the ambulance. 2. Where the shade or cool area is, and where ice or cold water is kept. 3. Who stays with the worker. OSHA says never leave a worker with heat-related illness alone. 4. The exact address and gate for emergency crews. OSHA’s first aid standards require ready first aid personnel and equipment. Compare the two big illnesses in our [heat exhaustion vs heat stroke guide](https://jmarsolutions.multisites.ai/guides/heat-exhaustion-vs-heat-stroke). ## Step 8: How do you review and improve the program? Review after each heat event and each season. OSHA says employers must report work-related deaths within eight hours and inpatient hospitalizations within twenty-four hours. Keep logs of readings, breaks, training dates and near misses. Ask three questions after each hot week: Did the lead call breaks early enough? Did new workers get the ramp-up? Did every supervisor know the 911 steps? Fix gaps before the next advisory day. OSHA’s On-Site Consultation Program is free and confidential for small and medium-sized businesses and can help with this review. ## What should a daily heat checklist include? Keep one page on the clipboard, and have the heat lead fill it out each shift. OSHA says heat conditions can change rapidly and that adjusting controls is critical to prevent heat illness. Check Fill in Forecast and NWS alert Heat index or WBGT forecast, advisory or warning, yes or no On-site reading WBGT reading, time, location, task Workload Light, moderate, heavy or very heavy New or returning workers Names, day number in the ramp-up, buddy Water, rest and shade Water stations stocked, break times set, shade or cool area ready Emergency Who calls 911, address and gate, cooling supplies in place Notes Symptoms reported, breaks skipped, changes made OSHA says weather reports are unlikely to give accurate heat estimates at sites with features such as direct sun, hot equipment or indoor work. Fill the sheet from what you see on site. ## Where does hydration fit, and what does JMAR offer? Hydration is one step in eight, not the whole program. JMAR Solutions supports step 4. Rapid Restoration Drops are a dietary supplement that replaces electrolytes lost in sweat and supports hydration. They are unflavored, with no sugar and no calories. They do not replace water, rest, shade or first aid. JMAR’s [hydration programs](https://jmarsolutions.multisites.ai/hydration-programs) work with safety managers to create, educate and coach. For the full prevention frame, read our [heat stress prevention pillar](https://jmarsolutions.multisites.ai/heat-stress-prevention). ## Next step Ready to put these eight steps on paper for your crew? [Book a 15-minute demo](https://calendly.com/jen-jmarsolutions/15-min-meeting) with JMAR Solutions, or ask about [bulk and government pricing](https://jmarsolutions.multisites.ai/bulk-orders). ## Frequently asked questions ### What is a heat stress program? It is a written plan that finds heat hazards, sets controls, trains people and says what to do when someone gets sick. OSHA says employers should create a written plan to prevent heat-related illness and fit it into a broader safety and health program. ### Is a heat illness prevention plan required by OSHA? OSHA's proposed rule would require a plan, but it is not final as of November 2026. Today OSHA enforces heat hazards under the General Duty Clause and the Heat National Emphasis Program. A written plan is OSHA's stated guidance and good evidence of effort. This is not legal advice. ### Who should run the heat program on site? OSHA says an individual at the worksite should monitor conditions and run the plan throughout the workday. That can be a foreman, jobsite supervisor, plant manager, safety director or another trained person. They need to know how to cool a worker and activate emergency services. ### How often should we train workers on heat? NIOSH says to train workers before hot outdoor work begins and to tailor the training to site conditions. Train every worker and supervisor. Repeat the topic in toolbox talks when a heat wave is forecast. Our heat toolbox talk guide has a short script. ### How can a small employer get help writing a plan? OSHA's On-Site Consultation Program is free and confidential for small and medium-sized businesses and can help employers build strategies for heat-related illnesses. JMAR Solutions also works with safety managers on hydration programs, toolbox talks and coaching. ## Terms on this page - [Heat illness prevention plan](https://jmarsolutions.multisites.ai/glossary/heat-illness-prevention-plan) - [On-site consultation](https://jmarsolutions.multisites.ai/glossary/on-site-consultation) - [Acclimatization](https://jmarsolutions.multisites.ai/glossary/acclimatization) - [Heat exhaustion](https://jmarsolutions.multisites.ai/glossary/heat-exhaustion) - [OSHA heat NEP](https://jmarsolutions.multisites.ai/glossary/osha-heat-nep) - [Buddy system](https://jmarsolutions.multisites.ai/glossary/buddy-system) - [Toolbox talk](https://jmarsolutions.multisites.ai/glossary/toolbox-talk) - [Electrolyte](https://jmarsolutions.multisites.ai/glossary/electrolyte) - [Heat stress](https://jmarsolutions.multisites.ai/glossary/heat-stress) - [Heat stroke](https://jmarsolutions.multisites.ai/glossary/heat-stroke) ## Sources 1. [OSHA: Heat planning and supervision](https://www.osha.gov/heat-exposure/planning) 2. [OSHA: Heat overview, working in outdoor and indoor heat environments](https://www.osha.gov/heat-exposure) 3. [OSHA: Heat injury and illness prevention rulemaking](https://www.osha.gov/heat-exposure/rulemaking) 4. [OSHA: Heat planning and supervision](https://www.osha.gov/heat-exposure/planning) 5. [OSHA: Heat planning and supervision](https://www.osha.gov/heat-exposure/planning) 6. [OSHA: Heat hazard recognition](https://www.osha.gov/heat-exposure/hazards) 7. [OSHA: Heat hazard recognition](https://www.osha.gov/heat-exposure/hazards) 8. [OSHA: Heat hazard recognition](https://www.osha.gov/heat-exposure/hazards) 9. [CDC/NIOSH: Heat stress workplace recommendations](https://www.cdc.gov/niosh/heat-stress/recommendations/index.html) 10. [OSHA: Heat planning and supervision](https://www.osha.gov/heat-exposure/planning) 11. [OSHA: US Department of Labor updates national emphasis program to protect workers from indoor, outdoor heat hazards](https://www.osha.gov/news/newsreleases/osha-national-news-release/20260410) 12. [OSHA: Heat overview, working in outdoor and indoor heat environments](https://www.osha.gov/heat-exposure) 13. [CDC/NIOSH: Heat stress workplace recommendations](https://www.cdc.gov/niosh/heat-stress/recommendations/index.html) 14. [OSHA: Water. Rest. Shade.](https://www.osha.gov/heat-exposure/water-rest-shade) 15. [OSHA: Water. Rest. Shade.](https://www.osha.gov/heat-exposure/water-rest-shade) 16. [OSHA: Water. Rest. Shade.](https://www.osha.gov/heat-exposure/water-rest-shade) 17. [OSHA: Water. Rest. Shade.](https://www.osha.gov/heat-exposure/water-rest-shade) 18. [OSHA: Water. Rest. Shade.](https://www.osha.gov/heat-exposure/water-rest-shade) 19. [OSHA: Water. Rest. Shade.](https://www.osha.gov/heat-exposure/water-rest-shade) 20. [CDC/NIOSH: Heat stress workplace recommendations](https://www.cdc.gov/niosh/heat-stress/recommendations/index.html) 21. [CDC/NIOSH: Heat stress workplace recommendations](https://www.cdc.gov/niosh/heat-stress/recommendations/index.html) 22. [OSHA: Protecting new workers from heat](https://www.osha.gov/heat-exposure/protecting-new-workers) 23. [OSHA: Protecting new workers from heat](https://www.osha.gov/heat-exposure/protecting-new-workers) 24. [CDC/NIOSH: Heat stress workplace recommendations](https://www.cdc.gov/niosh/heat-stress/recommendations/index.html) 25. [CDC/NIOSH: Heat stress workplace recommendations](https://www.cdc.gov/niosh/heat-stress/recommendations/index.html) 26. [CDC/NIOSH: Heat stress workplace recommendations](https://www.cdc.gov/niosh/heat-stress/recommendations/index.html) 27. [CDC/NIOSH: Heat stress workplace recommendations](https://www.cdc.gov/niosh/heat-stress/recommendations/index.html) 28. [CDC/NIOSH: Heat stress workplace recommendations](https://www.cdc.gov/niosh/heat-stress/recommendations/index.html) 29. [CDC/NIOSH: Heat stress workplace recommendations](https://www.cdc.gov/niosh/heat-stress/recommendations/index.html) 30. [CDC/NIOSH: Heat stress workplace recommendations](https://www.cdc.gov/niosh/heat-stress/recommendations/index.html) 31. [CDC/NIOSH: Heat-related illnesses](https://www.cdc.gov/niosh/heat-stress/about/illnesses.html) 32. [OSHA: Heat-related illnesses and first aid](https://www.osha.gov/heat-exposure/illness-first-aid) 33. [CDC/NIOSH: Heat-related illnesses](https://www.cdc.gov/niosh/heat-stress/about/illnesses.html) 34. [CDC/NIOSH: Heat-related illnesses](https://www.cdc.gov/niosh/heat-stress/about/illnesses.html) 35. [OSHA: Heat-related illnesses and first aid](https://www.osha.gov/heat-exposure/illness-first-aid) 36. [OSHA: Heat-related illnesses and first aid](https://www.osha.gov/heat-exposure/illness-first-aid) 37. [OSHA: Heat standards](https://www.osha.gov/heat-exposure/standards) 38. [OSHA: US Department of Labor updates national emphasis program to protect workers from indoor, outdoor heat hazards](https://www.osha.gov/news/newsreleases/osha-national-news-release/20260410) 39. [OSHA: Heat overview, working in outdoor and indoor heat environments](https://www.osha.gov/heat-exposure) 40. [OSHA: Heat planning and supervision](https://www.osha.gov/heat-exposure/planning) 41. [OSHA: Heat hazard recognition](https://www.osha.gov/heat-exposure/hazards) Checked against the sources above on November 5, 2026. Rules and guidance change, so check the linked page before you act. This page is general information, not legal or medical advice. ## Keep reading - [Heat stress prevention for high-risk crewsHeat stress prevention starts with water, rest and shade, then adds acclimatization for new workers, supervisor training and a written plan. NIOSH says to give workers cool water near the work area and to build up heat exposure over 7 to 14 days. Electrolytes support hydration when a crew sweats for hours.](https://jmarsolutions.multisites.ai/heat-stress-prevention) - [What OSHA expects on heat illness prevention todayAs of November 2026, there is no final federal OSHA heat standard. The proposed rule is still in rulemaking. OSHA enforces heat hazards today under the General Duty Clause and its revised Heat National Emphasis Program, effective April 10, 2026. Employers should write a heat plan, train crews, give water, rest and shade, and acclimatize new workers.](https://jmarsolutions.multisites.ai/guides/osha-heat-illness-prevention) - [Heat exhaustion vs heat stroke: spot the difference fastHeat exhaustion is the body losing water and salt: heavy sweating, headache, nausea, dizziness, weakness. Heat stroke is worse: confusion, slurred speech, seizures or collapse. Heat stroke is a 911 emergency. Cool the worker, stay with them and call 911. OSHA says: when in doubt, cool the worker and call 911.](https://jmarsolutions.multisites.ai/guides/heat-exhaustion-vs-heat-stroke) - [A heat acclimatization schedule for new and returning workersNIOSH says to build heat tolerance over 7 to 14 days. New workers do no more than 20% of the usual time in the heat on day 1, then add no more than 20% each day. Experienced workers can do 50%, 60%, 80%, then 100% on days 1 through 4. Cut the time, not the work intensity.](https://jmarsolutions.multisites.ai/guides/heat-acclimatization-schedule) - [WBGT vs heat index: pick the right heat reading for your crewWBGT is the better heat reading for crews. It combines temperature, humidity, sunlight and air movement. The heat index uses only temperature and humidity, measured in the shade. OSHA recommends WBGT meters, calls the heat index a less desirable substitute, and says OSHA uses WBGT to decide whether a heat hazard was present.](https://jmarsolutions.multisites.ai/guides/wbgt-vs-heat-index) - [Cold stress at work: spot it early, plan for itCold stress happens when cold air, wind or wet conditions pull heat from the body faster than it can make heat. NIOSH lists four cold-related illnesses: hypothermia, frostbite, trench foot and chilblains. Employers cut the risk with warm break areas, warm liquids, layered clothing, relief workers, training and close monitoring of at-risk crew.](https://jmarsolutions.multisites.ai/guides/cold-stress-at-work) ![Ironworkers silhouetted on a steel frame against a hot orange sunset](https://jmarsolutions.multisites.ai/_astro/sunset-steel.IhAMDca0_6wk53.webp) ## See it on your crew in 15 minutes Jennifer walks your safety team through the drops, the protocol and the numbers on a short live call. [Book a 15-minute demo](https://calendly.com/jen-jmarsolutions/15-min-meeting)