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    Heat Illness Prevention

    Definition

    Measures for managing occupational heat exposure. On 4 October 2026 OSHA's federal heat rule was still a proposal; five states have their own heat laws.

    Editorial definition: The QHSE Standard, updated 3 October 2026 · https://qhsetech.com/glossary/heat-illness-prevention

    Scope: Check current federal, state and local requirements. OSHA's rulemaking page distinguishes proposals from enforceable requirements.

    Sources checked: . Examples are editorial illustrations.

    What OSHA says about heat today: a proposal, an emphasis programme and the General Duty Clause

    OSHA's heat page points to a duty, a directive and, through a separate page, a rulemaking, and none of them is a final heat-specific rule. The first is Section 5(a)(1) of the Occupational Safety and Health Act of 1970, the General Duty Clause, under which an employer provides a workplace free of hazards that are causing or likely to cause death or serious harm. The second is a National Emphasis Program on outdoor and indoor heat-related hazards, shown on the heat page and on OSHA's emphasis list as directive CPL 03-00-024 with the date 10 April 2026. The third is the rulemaking. The heat page also lists five states, Washington, Minnesota, California, Oregon and Colorado, with specific laws on occupational heat exposure.

    The rulemaking page covers a proposed rule titled Heat Injury and Illness Prevention in Outdoor and Indoor Work Settings. It was published in the Federal Register on 30 August 2024. The public comment period closed on 14 January 2025, the informal public hearing ran from 16 June to 2 July 2025. The post-hearing comment period for people who had given notice of intention to appear ended on 30 October 2025. The docket is OSHA-2021-0009, and the page links the public comments and the post-hearing comments on regulations.gov. On 4 October 2026 the page shows no final rule, so the text of any requirement should not be quoted from the proposal as if it were in force.

    For prevention, the heat page has sections on planning and supervision, on what a heat-related illness is, on how it can be prevented and on personal risk factors. It encourages water, rest and shade for prevention and for treatment, advises using an on-site wet bulb globe temperature meter, and points to a NIOSH and OSHA heat app and to a chapter on heat stress in OSHA's Technical Manual. It has a section headed how hot is too hot and another on personal risk factors, which a record can mirror by keeping site conditions apart from individual factors. Employers outside the five states, and those in them, should check state and local requirements too. This page is general information, not legal advice, and OSHA's pages govern current status.

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    What a heat illness prevention record set looks like in software

    • Heat readings by site, area and time, with the method, such as a wet bulb globe temperature meter or a heat index estimate, and who took them.
    • The site's own action levels and the response each one triggers, with the date the levels were last reviewed.
    • Acclimatisation records for new and returning workers, with start dates and the exposure arrangements used.
    • Provision of water, rest and shade, with checks that cooling areas and drinking water were available.
    • Symptom reports and first-aid or medical responses, linked to the readings on the day.
    • Training records and the emergency plan, with the contacts and the site access for responders.
    • A requirements register that records each applicable state or local rule, its status and the date it was checked.

    Heat illness, heat stress and the three federal tools

    Heat stress is the load on the body from hot conditions, and heat illness is the harm that can follow, so a prevention record has to cover both exposure and symptoms. The General Duty Clause, an emphasis programme and a proposed rule are different instruments. A clause is in force now, an emphasis programme directs inspection effort, and a proposal is not a requirement in force. State heat laws are separate again, so a requirement in one state does not follow a worker to another.

    A hypothetical example: a month of readings

    This case is invented to illustrate the record and describes no real company. A distribution site sets its own action level at a wet bulb globe temperature of 28 degrees Celsius, which is a company choice and not a legal threshold. Over 22 working days the readings reach that level on 9 days, about 41 per cent of the month. On each of those days the supervisor records extra rest breaks, shaded areas and the checks on water supply, and the site logs water, rest and shade checks on every one of those shifts.

    Three workers report symptoms during the month, and all three reports fall on action-level days. Two are new starters in their first week, which the record links to the acclimatisation sheet. The review adds a note that the site must follow its state's rule if one applies, that the federal proposal is not in force and that the action level will be revisited after the month's data are read.

    Common misunderstandings about heat illness prevention

    • The federal proposal is not a rule. OSHA's page lists the stages completed and shows no final rule on 4 October 2026.
    • No federal rule does not mean no federal duty. The heat page points to the General Duty Clause and an emphasis programme.
    • Five states with their own laws does not mean the other states have none to check. Local and state requirements still have to be looked up.
    • A heat app or a thermometer reading is not a plan. The heat page lists measurement tools alongside planning, supervision, water, rest and shade.
    • Heat illness is not limited to outdoor work. The proposal and the emphasis programme both name indoor work settings.

    How heat illness prevention relates to other glossary terms

    Heat records draw on controls, protective equipment and enforcement terms.

    • OSHA NEP: the emphasis programme that sets inspection effort on heat.
    • Hierarchy of controls: the order for choosing controls such as shade or scheduling before personal measures.
    • PPE: cooling garments and similar items that sit at the end of that order.
    • WELL Building Standard: a building standard with a thermal comfort concept, aimed at indoor spaces.

    Records and evidence that usually exist for heat illness prevention

    • Heat readings with method, time and location.
    • The written plan, with its action levels and the date of review.
    • Acclimatisation and training records.
    • Checks of water, rest breaks and shade.
    • Symptom reports with the response taken.
    • The register of state and local requirements with dates checked.

    What a software tool needs to capture for heat illness prevention

    • Readings with location, time and method, entered in the field or imported from a meter.
    • Configurable action levels that start a task, an alert or a rest schedule.
    • Acclimatisation tracking per worker with start dates.
    • A link from each symptom report to the readings and controls of that day.
    • A requirements register with status and date checked.
    • Reports by site and period that can be exported for review.

    Catalog profiles documenting heat stress management

    The list comes from the heat stress rule. It does not show that a product follows any state heat law or supports a particular action level, which should be tested with your own readings.

    Same rule for every product: tagged “Heat Stress Management”, “Industrial Hygiene”, “Occupational Health”, “Incident Management”, “Audits & Inspections”, “Safety Management”, “Risk Assessment” or “Occupational Hygiene”, with a sourced heat stress, WBGT or heat exposure records capability in its record, or one the vendor stated to us, labelled as vendor-stated. Documented and conditional capabilities qualify; check the linked scope before treating a module as included.

    Ordered by how closely our sources document this process, not by quality. Sponsored placements are labelled. How lists are ordered

    All 5 matching profiles are shown. Documentation review, not hands-on testing or a claim of compliance.

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    Frequently asked questions

    Is there a federal OSHA heat standard?

    On 4 October 2026 OSHA's rulemaking page shows a proposed rule published on 30 August 2024 and no final rule. OSHA's heat page points to the General Duty Clause and a National Emphasis Program.

    Which states have their own heat laws?

    OSHA's heat page names Washington, Minnesota, California, Oregon and Colorado as having specific laws on occupational heat exposure. Check state and local requirements wherever the work takes place.

    Does heat illness only affect outdoor work?

    No. The proposed rule and the emphasis programme both name outdoor and indoor work settings.

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