Online Course · Heat Illness Prevention
Heat Stress Training: Prevent, Recognize and Respond to Heat Illness
Heat illness can turn from mild to life-threatening within a single shift. This heat stress training helps crews and supervisors build water, rest and shade into the workday and act fast when someone starts to struggle.
Why Heat Is a Workplace Hazard, Not Just Weather
The body sheds heat by sweating and by moving blood to the skin. Hot air, high humidity, direct sun, radiant heat from furnaces or ovens, heavy work and impermeable clothing all make that harder. When the body cannot keep up, core temperature climbs and the warning signs begin: heavy sweating, cramps, dizziness, headache, nausea and confusion.
Texas summers make this personal for us, but heat hazards are not limited to southern job sites. Foundries, laundries, kitchens, warehouses without air conditioning and attics anywhere can push workers past their limits. The course treats heat stress as a planned-for hazard with controls, just like noise or chemicals.
Heat-Related Illnesses at a Glance
| Condition | What you may see | What to do |
|---|---|---|
| Heat rash and heat cramps | Clusters of red bumps; painful muscle spasms during or after work | Move to a cooler area, drink water or electrolyte fluids, rest |
| Heat exhaustion | Heavy sweating, cool clammy skin, weakness, dizziness, nausea, headache | Stop work, move to shade or air conditioning, loosen clothing, sip fluids, cool with wet cloths; get medical help if no improvement |
| Heat stroke | Confusion, slurred speech, collapse, seizures, very high body temperature; skin may be hot and dry or still sweating | Call 911, cool the person immediately with water, ice or wet cloths, and stay with them until help arrives |
Heat stroke is a medical emergency. Never send a person with symptoms home alone or leave them unattended.
What the Heat Stress Training Covers
Learners move from how the body regulates temperature to practical decisions on the job. The lessons explain the heat index, how humidity and sun exposure change risk, and why the same temperature feels very different in a sealed tank or under a welding hood.
Water, rest and shade
Workers learn to drink small amounts frequently rather than waiting until they are thirsty, to use scheduled breaks in shade or cool areas, and to watch for the effect of caffeine, alcohol and some medications on hydration.
Acclimatization
New and returning workers are at the highest risk in their first days. The course explains the commonly recommended approach of building exposure gradually over the first week or two, and why people coming back from vacation or illness need the same care.
The buddy system and supervisor checks
Someone with heat illness may not recognize their own confusion. Learners practice watching coworkers, speaking up and knowing who to call.
Heat Rules and OSHA Expectations
Federal OSHA has proposed a heat-specific rule for indoor and outdoor work, and in the meantime it addresses heat hazards through the General Duty Clause and its heat exposure guidance. Several State Plan states, including California, Washington and Oregon, have their own heat illness requirements. Because the regulatory picture is changing, confirm the current rules that apply to your location; this course supports any heat illness prevention plan with consistent, documented training.
Who Should Take Heat Stress Training
- Construction, roofing and road crews
- Landscaping, agriculture and grounds maintenance teams
- Oil, gas and utility field workers
- Warehouse and distribution staff in non-air-conditioned buildings
- Foundry, bakery, kitchen and laundry employees exposed to indoor heat
- Supervisors responsible for work-rest schedules and emergency response
Heat Stress Questions
What is the difference between heat exhaustion and heat stroke?
Heat exhaustion is the body struggling to cope, with heavy sweating, weakness and nausea. Heat stroke is the body's cooling system failing, often with confusion or collapse, and requires 911 and immediate cooling.
When should we assign this course?
Before the hot season begins and for every new hire during warm months. Many employers repeat it each spring.
Is first aid training a good companion?
Yes. Our basic first aid overview and CPR and first aid certification prepare employees to respond while help is on the way.