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Cal/OSHA T8 §3395 · state heat rules

Heat Illness Prevention

Several states now require heat illness training before a worker's first hot day, and federal OSHA enforces heat hazards nationwide. This course covers water, rest, shade, and acclimatization, and what to do when someone goes down.

Who this course is for

  • Outdoor construction workers and their supervisors
  • Employers in states with a heat illness prevention rule
  • Roofing, paving, concrete, and landscaping crews
  • New hires and workers returning after time away

What you will be able to do

  • Describe how the body handles heat and what raises the risk
  • Recognize heat cramps, heat exhaustion, and heat stroke
  • Give first aid and call for emergency help without delay
  • Follow water, rest, and shade practices at trigger temperatures
  • Explain acclimatization for new and returning workers
  • Supervisors: monitor conditions and carry out the employer's written plan

Course outline

  1. Heat and the bodyEnvironmental and personal risk factors, including PPE and workload.
  2. Recognizing heat illnessSigns and symptoms, and why confusion means call 911.
  3. RespondingCooling, first aid, and emergency procedures for remote sites.
  4. Water, rest, shadeHow much, how often, and what counts as shade.
  5. Acclimatization and high heatThe first two weeks, heat waves, and high-heat procedures.
  6. State supplementsKey requirements in California, Washington, Oregon, Nevada, and Maryland.
Know before you enroll

State rules differ on trigger temperatures and written plan contents, and are updated often. Employers must also train workers on their own site-specific heat illness prevention plan.

A federal OSHA heat standard has been proposed but is not final. The course will be updated when it is.

Questions about this course

Which states require heat illness training?

California, Washington, Oregon, Nevada, and Maryland are among the states with heat illness prevention rules that include training. Requirements change, so confirm the current rule with your state agency.

Does this cover supervisors?

Yes. The course includes the additional topics supervisors are expected to know, such as monitoring weather, carrying out the written plan, and emergency response.

How does the final exam work?

The course ends with a timed, multiple-choice exam drawn from a question bank. The passing score is 70 percent and retakes are included. Your certificate is issued the moment you pass.

Will my employer or general contractor accept the certificate?

Every certificate shows the course, contact hours, completion date, the standard covered, and a unique ID with a QR code, so anyone can confirm it in seconds. Acceptance is always the employer's or site owner's decision. If a site requires a specific provider or a hands-on evaluation, check with them before you enroll.

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