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Workplace SafetyUpdated June 10, 2026 · 7 min read

How to Keep Workplace Heatstroke Prevention Records

At workplaces where heat is part of the job, such as construction sites, outdoor work, kitchens, and warehouses, preparing for heatstroke becomes a serious concern every year as summer approaches. Many teams do take precautions, like setting out drinks and reminding people to rest. But surprisingly few keep a record of when those steps were taken, by whom, and what was actually done.

This article walks through how to turn your heatstroke precautions into a daily record: measuring the environment with the heat index (WBGT), setting rules for rest breaks and water and salt intake, checking on each worker's condition, and preparing training and emergency procedures. With a record in place, you can confirm the same day that your precautions were actually carried out, and you gain material for end-of-season reviews and next year's planning.

One important note before we start. Occupational safety and health obligations and standards differ depending on your industry and the nature of the work at your site. Always check the latest standards and requirements with official sources such as your national or local labor authorities, or with an occupational physician or other qualified specialist. This article is general guidance on record keeping only.

Why Put Heatstroke Precautions on Paper

Heatstroke prevention is the kind of work where it is easy to believe you are doing it. On busy days, the reminder to take a break gets skipped, or a measurement gets forgotten, and without a record no one notices the gap. A simple checklist-style record lets you see at a glance whether the day's precautions were actually carried out.

The other role a record plays is reflection. When you can see from your records which times of day and which tasks produced the most complaints of feeling unwell, or whether the number of breaks was really enough, you can plan concrete next steps, like moving breaks earlier or reordering the day's tasks.

  • A checklist-style record makes gaps in the day's precautions visible right away.
  • Patterns emerge, like which times and tasks lead to people feeling unwell.
  • It becomes the raw material for end-of-season reviews and next year's plan.

Record Environmental Readings Such as the Heat Index (WBGT)

To gauge heat stress, the heat index known as WBGT is widely used, because it reflects humidity and sunlight as well as air temperature. Measure the value at the work area with a WBGT meter or similar device, and record it together with the time and the location. Deciding in advance how many times a day you will measure, and where, keeps the record consistent.

It also helps to note the conditions alongside the number: direct sun or shade, airflow, how strenuous the work is, and what people are wearing. The same reading can mean a very different load on the body. As for how to interpret the readings, always check the latest guidance from official sources such as your labor authorities.

  • Record each reading together with the time and location.
  • Decide the number and locations of measurements in advance.
  • Note conditions too: sun, airflow, and how strenuous the work is.

Set Rules for Rest and Hydration, Then Record Them

Rest breaks and water and salt intake tend to get pushed back when left to in-the-moment judgment. Before work starts, decide the rules and write them down: how often to break, where to rest, and who sets out the drinks and salt tablets or snacks, and where.

Once the rules are set, the record itself can be as simple as checking off whether each one was followed. Tick a box at every break, or check how much of the prepared drinks remain at the end of the day. On days a rule could not be followed, jot down a one-line reason. Those notes are exactly what you need when it is time to revise the rules themselves.

  • Set the break interval, rest location, and drink preparation as rules in advance.
  • Record compliance with simple checkboxes so it never becomes a burden.
  • On days a rule was missed, note the reason in one line.

Make Worker Condition Checks a Daily Routine

At the morning meeting or a similar fixed moment, check whether each person slept well, ate breakfast, and feels okay, and note the answers briefly. Beyond self-reporting, it is reassuring to have a space for what others notice, such as someone's color or how they respond when spoken to.

If someone shows signs of trouble during work, the first priority is to stop the work and have them rest somewhere cool, without pushing through. If they do not recover, or anything about their condition seems off, do not hesitate to consider calling emergency services. Do not attempt medical judgments on the spot. What matters for the record is writing down what was done and at what time.

  • Record the morning check: sleep, breakfast, and how each person feels.
  • Include a space for what coworkers notice, not just self-reports.
  • If someone is unwell, stop work and rest them first, and do not hesitate to consider calling emergency services.
  • Write down what was done and at what time.

Include Training and Emergency Preparation in the Record

Whenever you run training or give reminders about heatstroke prevention and first response, record the date, who attended, and what was covered. This applies not only to formal training at the start of the season, but also to short reminders at the morning meeting. When the accumulation is visible, it is easier to keep going.

Also check on a regular basis that emergency contact numbers, the designated medical facility, and first-response procedures are posted at the site where anyone can find them at a glance, and record each check. Whether your team can act when it matters comes down to confirming this preparation day to day.

  • Record the date, attendees, and content of training and reminders.
  • Regularly inspect the posted emergency contacts, hospital, and procedures.
  • Record the date of each inspection so nothing slips through.

Review Your Records, and Use Tools to Keep It Going

Accumulating records is not the goal in itself. At the end of the week, or at a natural break in the season, look back over them. How did the team handle the harshest days? Which tasks drew the most complaints of feeling unwell? That review is what turns the record into next steps.

For the daily record itself, a checklist with the items already laid out takes much of the burden away. We have prepared a workplace heatstroke prevention checklist template you can print and keep at the site, so starting on paper is a perfectly good approach. Recording on a smartphone app is another option, and our studio is currently preparing HeatGuard Log, an app for workplace heatstroke prevention records.

  • Review the records at the end of the week or season and look for improvements.
  • Use a checklist for the daily record to keep the burden low.
  • Start on paper, and consider an app later if it suits your team.

FAQ

How detailed do the records need to be?

Being able to keep them up every day comes first. A good starting point is the basics, heat index readings, checkboxes for rest and hydration, and the results of condition checks, plus a one-line note for anything you noticed. As for what your site is formally required to record, that depends on your industry and the work involved, so please confirm the details with official sources or an occupational physician or other specialist.

At what WBGT reading should we stop work?

This article deliberately does not state specific thresholds. The reference values for WBGT and the measures expected of you vary with the nature of the work and other conditions, and the standards themselves are revised over time. Always check the latest guidance from official sources such as your labor authorities, and consult an occupational physician or specialist when in doubt.

Is record keeping worthwhile even for a small crew?

Yes. Regardless of headcount, records help prevent gaps in your precautions and give you something to review. On a small crew, one person falling ill has an outsized impact, so even a simple checklist is worth keeping. For whether and how record keeping is legally required in your case, please confirm with a specialist or official sources.

What should we do if someone feels unwell during work?

Stop the work first and have them rest somewhere cool, that is the priority. If they do not recover, or if anything about their consciousness or responses seems off, do not hesitate to consider calling emergency services. This article does not provide medical advice. Please confirm first-response procedures in advance with the latest information from official public health sources.

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