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Heat illness quiz: heat stress safety for US workplaces

Heat illness is preventable, yet it still kills workers every summer, often on their first days on the job. There is no final federal OSHA heat standard yet, but employers still have duties. This quiz reviews the signs, the first aid and the rules, keeping federal and state requirements apart.

Updated 31 October 2026

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Heat illness quiz: OSHA heat safety review (13 questions)

Heat illness prevention at US workplaces: the status of the federal heat rule, the General Duty Clause, OSHA's heat National Emphasis Program, state heat standards, heat stroke signs and first aid, acclimatization, water and reporting (29 CFR 1904.39). Free practice quiz with instant feedback; every explanation cites its source on osha.gov (regulatory text, the heat National Emphasis Program or OSHA's heat pages). There is no final federal OSHA heat standard yet; some states have their own. Independent review material: not affiliated with or endorsed by OSHA, and it does not replace the training your employer must provide.

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Federal rules: no heat standard yet

OSHA published a proposed rule, Heat Injury and Illness Prevention in Outdoor and Indoor Work Settings, on August 30, 2024; the public hearing ended in July 2025 and post-hearing comments closed on October 30, 2025. As of this page's update there is no final federal heat standard (OSHA heat rulemaking).

Federal OSHA cites heat hazards under the General Duty Clause, Section 5(a)(1) of the OSH Act. Its heat National Emphasis Program, Directive CPL 03-00-024 (April 10, 2026), targets high-risk industries, treats days with a heat index of 80°F or more as heat priority days, and schedules inspections when the National Weather Service issues a heat warning or advisory. Related rules apply too: potable water (29 CFR 1910.141(b)(1)(i), 1926.51(a)(1)), trained first aid responders where no clinic is close (1910.151(b)), and reporting a work-related fatality within 8 hours and an inpatient hospitalization within 24 hours (29 CFR 1904.39).

State heat rules

According to OSHA's heat standards page, California, Colorado (agriculture), Minnesota (indoor workplaces), Oregon and Washington have their own heat standards under their State Plans. California's Heat Illness Prevention Standard (Title 8, section 3395) requires training, water, shade and planning, triggered at 80°F. These are state rules: check the full text with the state agency if you work there.

Signs, first aid and new workers

Heat stroke: confusion, slurred speech, unconsciousness, seizures. Call 911 and cool the worker immediately; cold water or ice bath immersion is the fastest method. Never leave the worker alone (OSHA first aid page).
Do not try to diagnose which heat illness it is: when in doubt, cool the worker and call 911.
Almost half of heat-related deaths happen on a worker's first day, or first day back after an absence; new and returning workers need time to acclimatize, with workloads increased gradually.
Drink water regularly, not only when thirsty; for jobs over two hours, electrolyte drinks too. Rest breaks get longer as heat stress rises, in shade or a cool area.

Using the quiz

Play it at a short safety talk before the hot season and again on the first hot days. Quizhat is an independent tool, not affiliated with or endorsed by OSHA.

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Run these reviews live in your sessions: the quiz goes on the big screen, everyone answers from their phone with a code, and the right answer and its CFR reference appear after each question. For your training records, Test mode (Formatore plan) stores named answers with a pass mark you set and gives you a downloadable report. Quizhat helps you check understanding; the training itself, and any certification the standard requires, stay your responsibility as employer or trainer.

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Frequently asked questions

Does OSHA have a heat standard?

Not a final one. OSHA proposed a federal heat injury and illness prevention rule in August 2024; as of this page's update it has not been finalized. Federal OSHA cites heat hazards under the General Duty Clause, and some states have their own heat standards.

What temperature triggers OSHA heat inspections?

Under the heat National Emphasis Program, a day with a heat index expected at 80°F or more is a heat priority day, and programmed inspections take place on days with a National Weather Service heat warning or advisory.

What should you do if a coworker shows signs of heat stroke?

Call 911, move the worker to a cooler area and cool them right away, ideally in cold water or an ice bath, and stay with them until help arrives.

Which states have heat illness standards?

OSHA lists California, Colorado (agriculture), Minnesota (indoor), Oregon and Washington. Check the state agency for the full text.

Is this a Cal/OSHA heat illness training test?

No. It is an independent practice quiz based on OSHA's heat pages and federal regulations; California and other states have their own training content.