We’ve all been waiting for it, and it looks like the warm weather is finally here to stay. As temperatures rise, students are spending more time in the playground and outdoor learning spaces, increasing the likelihood of heat-related illnesses in schools.
Heat can indeed pose a significant hazard, and children are particularly vulnerable to hot weather due to their physiology, behaviours, and activity levels. Children under four years of age may be at increased risk, as well as those with underlying health conditions or taking certain medications.
Two of the most common conditions that can affect pupils during warm weather are dehydration and heat exhaustion, which can progress to heat stroke in more severe cases.
Understanding the signs, acting early, and knowing what to do can make all the difference.
Dehydration occurs when the body loses more fluid than it takes in. Children are particularly vulnerable as they may not always recognise thirst or remember to drink regularly during busy school days.
Encouraging regular water intake throughout the day is one of the simplest and most effective ways schools can help prevent dehydration and other sun-related illnesses.
💡 Good to know
Young children may not be able to tell others they are thirsty and are therefore more at risk of dehydration. (British Nutrition Foundation)
Children aged 4 to 8 need 1.1 s to 1.3 litres of fluids per day. While girls aged 9 to 13 need 1.3 to 1.5 litres per day, it is advised that boys aged 9 to 13 drink 1.5 to 1.7 litres per day. (European Food Safety Authority)
Because dehydration can lead to heat exhaustion, it is important to ensure pupils drink enough throughout the day, especially in warm weather when the body loses more fluid through sweating.
Heat exhaustion happens when the body becomes overheated and is unable to cool itself down.
It often occurs after prolonged exposure to heat, particularly during outdoor activities, sports lessons, or in poorly ventilated indoor spaces.
Prompt action is essential to prevent heat exhaustion from progressing to heatstroke.
Heatstroke is the most serious heat-related condition and should always be treated as a medical emergency. It occurs when the body’s temperature regulation system fails, causing the core body temperature to rise above 40°C.
If heatstroke is suspected, school staff must call 999 immediately.
Take the pupil indoors or into shade and encourage them to rest.
Small, frequent sips of water are best.
If possible, use cool compresses, fans, or damp cloths on the neck, wrists, and forehead.
Watch for any signs of deterioration, particularly confusion, vomiting, or loss of consciousness.
If heatstroke is suspected, call 999 immediately and continue cooling efforts while waiting for emergency services.
Preparation is key when it comes to warm weather safety.
Schools can help reduce risk by:
✅ Encouraging regular water breaks throughout the day
✅ Ensuring pupils have access to drinking water at all times
✅ Scheduling outdoor activities outside peak heat hours where possible
✅ Providing shaded areas for break times and PE lessons
✅ Allowing uniform adjustments during heatwaves where possible
✅ Educating pupils on the importance of hydration
Small, simple adjustments can make a big difference to pupil wellbeing and safety, helping pupils to stay comfortable, safe, and able to make the most of warm weather.
Below are some guidance sheets on dehydration, heat exhaustion, and heatstroke to share with your colleagues this spring. These resources provide important information on recognising the symptoms of each condition and how to respond effectively in case of an emergency. By familiarising yourself with these resources, you can help ensure the safety and wellbeing of the students in your care during warmer weather.