Heat Exhaustion Heatstroke

Symptoms of heat exhaustion

The symptoms of heat exhaustion include:

• tiredness
• dizziness
• headache
• feeling sick (nausea) or being sick (vomiting)
• excessive sweating and skin becoming pale and clammy (a change in skin colour can be harder to see on brown or black skin)
• cramps in the arms, legs and stomach
• a high temperature
• being very thirsty
• feeling irritable

The symptoms of heat exhaustion are often the same in adults and children.

If someone is showing signs of heat exhaustion they need to be cooled down and given fluids.

Symptoms of heatstroke

The symptoms of heatstroke include:

• a very high temperature
• hot skin without sweating
• fast breathing and a fast heartbeat
• confusion and restlessness
• seizure (fit)
• loss of consciousness

Heatstroke is a medical emergency. Get immediate medical help if someone has the symptoms of heatstroke.

Things you can do to cool someone down

If someone has heat exhaustion, follow these 4 steps:

1. Move them to a cool place.
2. Remove all unnecessary clothing like a jacket or socks.
3. Give them plenty of water to drink - you can also give them an isotonic sports drink or oral rehydration powder that you mix with water, which will help replace salt lost through sweating.
4. Cool their skin - spray or sponge them with cool water and fan them. Cold packs, wrapped in a cloth and put under the armpits or on the neck are good too.

Stay with them until they're better.

They should start to cool down and feel better within 30 minutes.

Get help from NHS 111 now if:

Call 999 now if:

Do not drive yourself to A&E.

The person you speak to at 999 will give you advice about what to do.

What to do while waiting for help with heatstroke

Wrap the person in a cool, wet sheet, or fan them or sponge them down with cold water while you wait for help to arrive.

If they lose consciousness while you're waiting for help, put them in the recovery position and tell the ambulance service. Check their breathing and pulse and carry out CPR if they show no sign of life.

Find out how to put someone in the recovery position on the St John Ambulance website.

Preventing heat exhaustion and heatstroke

There's a high risk of heat exhaustion or heatstroke during hot weather or exercise.

To help prevent heat exhaustion or heatstroke:

• drink more cold drinks, especially if you're active or exercising
• wear light-coloured, loose clothing
• avoid the sun between 11am and 3pm
• avoid drinking too much alcohol
• avoid extreme exercise
• if you're inside on a very hot day, close curtains, and close windows if it's hotter outside than in your home, and turn off electrical equipment and lights that get hot

This will also prevent dehydration and help your body keep itself cool.

Check on children, older people and people with long-term health conditions, such as diabetes or heart problems, as they're more at risk of heat exhaustion or heatstroke.

Find out more about how to cope in hot weather

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