Heat-related illnesses can develop rapidly and become life-threatening if not treated immediately. Every worker should know how to recognize the signs of heat cramps, heat exhaustion, and heat stroke, understand the site's emergency response procedures, and act quickly when a coworker becomes ill. A prompt and coordinated response can prevent serious injury or save a life.
This toolbox talk reviews the emergency response procedures for heat-related illnesses and the actions workers should take if someone shows signs of heat stress.
Why This Matters
- Heat stroke is a life-threatening medical emergency that requires immediate action.
- Early recognition and treatment can prevent heat exhaustion from becoming heat stroke.
- Every worker should know how to summon emergency assistance.
- Rapid cooling can improve outcomes for workers experiencing severe heat illness.
- Prepared crews respond more effectively during emergencies.
Common Hazards
- Failing to recognize early symptoms of heat-related illness.
- Delaying medical treatment.
- Workers continuing to work despite feeling unwell.
- Poor communication during an emergency.
- Limited access to shade, cooling equipment, or drinking water.
- Workers operating alone in hot environments.
- Extreme temperatures combined with strenuous physical activity.
- New or unacclimatized workers at increased risk of heat illness.
Safety Checklist
Before Work Begins
- Review the site's heat stress emergency response procedures.
- Ensure all workers know how to contact emergency medical services.
- Identify the locations of hydration stations, shaded recovery areas, first aid supplies, and emergency access points.
- Review the signs and symptoms of heat cramps, heat exhaustion, and heat stroke.
- Assign buddies or supervisors to monitor workers during periods of extreme heat where appropriate.
- Verify emergency contact information and site directions are readily available.
If a Worker Shows Signs of Heat Illness
- Stop work immediately and move the worker to a shaded or cooled area.
- Notify a supervisor and activate the site's emergency response procedures.
- Loosen or remove unnecessary clothing or PPE if it can be done safely.
- Provide cool drinking water only if the worker is alert, conscious, and able to drink safely.
- Use available cooling methods such as cool wet cloths, fans, misting, or ice packs applied to areas such as the neck, armpits, and groin while awaiting medical assistance.
- If heat stroke is suspected—such as confusion, altered mental status, seizures, collapse, or loss of consciousness—call emergency medical services immediately, begin rapid cooling, and stay with the worker until help arrives.
Crew Talking Points
- What are the warning signs of heat exhaustion and heat stroke?
- How do we contact emergency medical services from this jobsite?
- Where are today's cooling areas, first aid supplies, and hydration stations?
- Who is responsible for directing emergency responders to the work location?
- Which workers may require additional monitoring today?
- Speak up immediately if you or a coworker begin experiencing symptoms of heat-related illness.
Stop Work If
- A worker shows signs of heat exhaustion or heat stroke.
- Emergency communication procedures cannot be carried out.
- Cooling resources or drinking water are unavailable.
- Heat conditions become too severe for work without additional protective measures.
- A worker becomes confused, collapses, has a seizure, or loses consciousness.
- You are unable to safely continue working because of heat exposure.
Final Reminder
Heat-related emergencies require immediate action. Recognize the symptoms early, stop work, move the worker to a cool location, begin cooling measures, and call emergency medical services immediately if heat stroke is suspected. Quick action can make the difference between a full recovery and a life-threatening emergency.
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