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Understanding heat stress and how to avoid it

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Heat stress occurs when extended exposure to heat disrupts the body’s ability to regulate temperature, leading to risks like heat exhaustion and heat stroke. As part of our 'Beat the Heat' campaign, here's some advice on how to understand, prevent, and manage it.

Causes of heat stress

  • High temperatures: Prolonged exposure to hot weather, especially when combined with high humidity.
  • Strenuous physical activity: Engaging in intense physical activities in hot environments.
  • Inadequate hydration: Not drinking enough water to compensate for fluid loss through sweating.
  • Protective clothing: Wearing heavy or non-breathable clothing that traps heat.
  • Lack of acclimatisation: Sudden exposure to high temperatures without allowing the body to gradually adjust.

Symptoms of heat stress

  • Heavy sweating: Excessive sweating as the body tries to cool down.
  • Thirst and dehydration: Feeling very thirsty and showing signs of dehydration.
  • Fatigue and weakness: Feeling unusually tired and weak.
  • Dizziness and fainting: Experiencing dizziness or fainting spells.
  • Muscle cramps: Painful muscle cramps due to loss of electrolytes.
  • Nausea and headache: Feeling nauseous and having headaches.
  • Rapid pulse: A fast and weak pulse.
  • Confusion: Difficulty concentrating or confusion.

Preventing heat stress

  1. Stay hydrated: Drink plenty of water throughout the day. Avoid caffeinated and sugary drinks as they can contribute to dehydration.
  2. Wear appropriate clothing: Choose lightweight, breathable, and moisture-wicking fabrics like those used in FireBear PPE. This helps keep you cool and dry.
  3. Take regular breaks: Schedule breaks in shaded or air-conditioned areas to cool down. This is especially important during peak heat hours.
  4. Acclimatise gradually: Allow your body to gradually adjust to high temperatures by slowly increasing your exposure to heat over several days.
  5. Use cooling accessories: Utilise cooling towels, neck wraps, or vests that can be worn under your PPE to help lower your body temperature.
  6. Monitor weather conditions: Plan your work schedule around the weather forecast, avoiding strenuous activities during the hottest parts of the day.
  7. Eat light meals: Consume smaller, more frequent meals to avoid generating excess body heat from digestion.
  8. Recognise symptoms early: Be aware of the signs of heat stress and take immediate action if you or a coworker start showing symptoms.
  9. Educate your team: Ensure all team members are trained to recognise and respond to heat stress symptoms. Provide regular reminders and updates on safety practices.
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How FireBear helps you Beat the Heat.

  • Ultra-lightweight design: FireBear PPE is engineered to be lightweight, reducing the burden on workers and helping them stay cool.
  • Breathable materials: The breathable BearFlow® fabric allows air circulation, preventing heat buildup.
  • Moisture-wicking technology: FireBear PPE uses moisture-wicking fabrics to keep workers dry and comfortable, even in high temperatures.
  • Reduced layers: With FireBear PPE, workers can wear fewer layers without compromising safety, making it easier to stay cool.

Find out more in our summer workwear page.

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