When temperatures rise, outdoor work becomes tougher and riskier. Heat stress can creep up quickly, and recognising the early signs can prevent serious harm. Every business with outdoor staff should feel confident identifying the warning signals and knowing how to respond.
Early Signs of Heat Stress
Heat stress happens when the body can’t cool itself effectively. The first signs are easy to miss, so it pays to stay alert to:
- Excessive sweating – Workers may look unusually drenched, even when taking it slow.
- Thirst and dry mouth – A clear sign the body is struggling to stay hydrated.
- Fatigue or weakness – Heat makes the heart work harder; tiredness is a key early indicator.
- Muscle cramps – Often the result of salt and fluid loss.
- Headache or dizziness – A classic red flag that heat is affecting the central nervous system.
- Clammy, pale skin – Shows the body is struggling to regulate temperature.
- Confusion, irritability or poor concentration – Cognitive changes often appear before more obvious physical ones.
If symptoms progress to hot, dry skin, rapid pulse, nausea, collapse, or loss of consciousness, this may indicate heat exhaustion or heat stroke, which is a medical emergency.
What to Do if You Spot These Signs
Acting quickly is essential. Follow these steps as soon as you notice any of the symptoms above:
1. Stop Work Immediately
Remove the person from the task. Heat stress worsens rapidly if activity continues.
2. Move Them to a Cooler Area
Ideally find a shaded spot, an air-conditioned vehicle, or an indoor space. Even a breezy area can help.
3. Encourage Hydration
Give them cool water to sip slowly. Avoid energy drinks or anything with caffeine, as these can make dehydration worse.
4. Help Them Cool Down
Use whatever is practical on site:
- Loosen clothing
- Remove PPE temporarily if safe to do so
- Use cool, damp cloths on the neck, armpits, and forehead
- Provide airflow with fans or open vehicle windows.
5. Monitor Closely
Keep a close eye on their symptoms. If they don’t improve within 30 minutes, call for medical advice.
6. In an Emergency, Call 111
If the worker shows any of the following—confusion, vomiting, collapse, seizures, difficulty breathing, or skin that becomes hot and dry—seek emergency help immediately. Heat stroke can be fatal if not treated quickly.
Preventing Heat Stress on Site
While recognising the signs is vital, prevention is even better. Practical measures include:
- Regular hydration breaks
- Rotating tasks to reduce time in direct sun
- Providing shade during rest periods
- Setting clear expectations for reporting symptoms early
- Ensuring PPE and clothing are appropriate for hot conditions
- Training workers to recognise symptoms in themselves and their teammates builds a safer, more confident workforce.
Read our blog 5 Practical Ways to Protect Your Team from Summer Heat to find out how proactive steps can help you team stay safe in the Summer.
We can help
WorkAble offers a range of services that can make it easier to look after your team in the heat of Summer. If your team are working outdoors and you would like support to keep them healthy and safe, call us today.