Heat Stress vs. Heat Stroke and its Management

 

1. Heat Stress vs. Heat Stroke – Key Difference

Feature	Heat Stress	Heat Stroke
Definition	The body's inability to cool itself enough to maintain a safe core temperature.	The most severe form of heat illness — life-threatening medical emergency. Core body temperature > 40.5°C (105°F).
Severity	Mild to moderate — precursor to heat stroke.	Severe — organ failure and death if not treated immediately.
Consciousness	Usually awake, may be confused or dizzy.	May be confused, delirious, or unconscious.
Sweating	Often sweating heavily (unless dehydration severe).	May stop sweating (hot, dry skin) — but can sometimes still sweat (especially exertional heat stroke).
Body temperature	Normal to slightly elevated (< 40°C).	> 40.5°C (105°F) — a key warning sign.
Heart rate	Fast, but strong.	Fast and weak or irregular.
Medical urgency	Needs monitoring and cooling, but not immediately life-threatening.	Call emergency services immediately — minutes matter.

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2. Spectrum of Heat Illness (Mild → Severe)

Condition	Symptoms	Action
Heat Rash	Red, itchy skin bumps (prickly heat)	Keep skin cool and dry; avoid creams
Heat Cramps	Painful muscle spasms (legs, arms, abdomen)	Rest in cool area; drink electrolyte solution; gentle stretching
Heat Exhaustion	Heavy sweating, weakness, nausea, headache, pale skin, dizziness	Move to shade/cool room; remove excess clothing; drink cool water (slowly); apply cool compresses
Heat Stroke	Confusion, loss of consciousness, hot/dry skin (or moist), seizures, very high body temperature	Emergency! Call ambulance; rapid cooling (ice packs, cold water immersion, fan with mist)

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3. Signs & Symptoms – Quick Reference Card

 Heat Exhaustion (Act before it worsens)

• Heavy sweating

• Pale, clammy skin

• Nausea or vomiting

• Dizziness or lightheadedness

• Weak, rapid pulse

• Muscle cramps

• Headache

• Fatigue

Heat Stroke (Call Emergency – 1122 / 911)

• High body temperature (≥ 40.5°C / 105°F)

• Hot, red, dry skin (or sometimes moist)

• No sweating (classic) – but exertional heat stroke may still sweat

• Throbbing headache

• Dizziness, confusion, or loss of consciousness

• Seizures

• Rapid, shallow breathing

• Rapid, weak pulse

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4. First Aid – What to Do

For Heat Exhaustion

1. Move person to a cool, shaded or air-conditioned area.

2. Remove unnecessary clothing (jacket, boots).

3. Fan the person and apply cool wet cloths to head, neck, armpits, groin.

4. Give cool water (not ice-cold) or electrolyte drink slowly – if they are awake and can swallow.

5. If no improvement within 30 minutes, seek medical help.

For Heat Stroke – EMERGENCY

1. Call ambulance immediately (or arrange urgent transport to hospital).

2. While waiting:

   • Move person to the coolest available place (shade, AC room).

   • Rapid cooling is lifesaving – immerse in cold water (if possible) or apply ice packs to neck, armpits, groin.

   • Spray with cool water and fan vigorously.

   • Monitor breathing – if unconscious and not breathing, start CPR (if trained).

3. Do NOT give anything by mouth if confused or unconscious (risk of choking).

4. Continue cooling until body temperature drops to ~38.5°C (101.5°F) – but do not overcool.

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5. Prevention – Workplace Controls (Sugar Mill / Hot Zones)

Control Type	Examples
Engineering	Insulate hot pipes/boilers; install ventilation/fans; shade outdoor work areas
Administrative	Schedule heavy work during cooler hours; rotate jobs every 30–45 minutes; mandatory rest breaks in cool rooms
Personal	Provide cool drinking water (2–3 L per shift), electrolyte powders; light-colored, breathable clothing; hats
Monitoring	Use WBGT (Wet Bulb Globe Temperature) meters to assess heat risk; assign a "heat buddy" to watch for early signs
Training	Train all workers to recognize heat stress in themselves and others; conduct heat stress drills

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6. Your Plant's Responsibility (Linking to Your Earlier Questions)

• • Drinking water points within 50 m of all work areas.

  • Rest shelters with fans / AC for break times.

  • First aid kits with ice packs and oral rehydration salts.

  • Work schedules adjusted during peak summer (11 am – 3 pm).

• Supervisors must enforce mandatory hydration breaks and watch for early signs.

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7. Printable Quick Guide (Poster Text)

HEAT STRESS – WATCH FOR:

• Heavy sweating

• Dizziness

• Nausea

• Cramps

→ Move to shade, drink water, rest.

HEAT STROKE – EMERGENCY:

• Hot/dry skin (or still moist)

• Confusion / unconsciousness

• Very high body temperature

→ CALL EMERGENCY – COOL RAPIDLY – DO NOT GIVE DRINKS IF UNCONSCIOUS