Love hot weather? Be careful that you don’t overdo it. Summer temperatures at home and abroad can hit heights that can be dangerous for your health. In the summer of July 2019 we hit the highest temperature ever recorded in the UK - a staggering 38.7C.
Being careful when it’s hot isn’t just a question of avoiding sunburn, being too hot can have a dangerous effect on your whole body. The conditions caused by over-heating are known as heat exhaustion, heatstroke and sunstroke.
Heatstroke and sunstroke are similar conditions. Sunstroke is the name for heatstroke when you’ve developed it by being in the sun.
Read more about sunburn and how to treat sunburn.
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Heat exhaustion symptoms
When our body temperature is normal it measures around 37 degrees C or 98.6 degrees F. Health problems start when your body’s internal (core) temperature rises to 40 degrees C or 104 degrees F or more.
Heat exhaustion is less dangerous than heatstroke or sunstroke. With heat exhaustion you feel very hot, and the amount of water and salt in your body drops below normal levels. You may also feel dizzy and confused.
Heatstroke and sunstroke are far more serious than heat exhaustion. These conditions can happen when your body’s internal (core) temperature goes over 40 degrees C or 104 degrees F.
A high temperature is one of the main signs of heatstroke and sunstroke.
Signs & symptoms of heatstroke/sunstroke may also include:
- Painful, throbbing headache
- Feeling desperately thirsty
- Feeling very hot
- Nausea and vomiting
- Being agitated
- Behavioural changes such as confusion, disorientation
- Being irritable
- Being delirious
- Having a drop in blood pressure
- Fast pulse
- Rapid, shallow breathing
- Losing consciousness / fainting
If you see someone with these symptoms call for medical help immediately.
How you can help
Heat exhaustion can make you feel quite unwell, but if caught at this stage, shouldn’t usually be serious. If you are concerned that you – or someone else – has heat exhaustion, take these steps as soon as you can.
It’s important to reduce the body temperature, so find somewhere cool where the person with you can lie down, and take off as much of their clothing as possible. The next step is to cool them down as much as you can. Use a cool, damp cloth on their skin, to help bring their temperature down.
While their skin is damp, fan them with anything you have to hand. By doing this you’ll encourage the moisture on their skin to evaporate, which is a natural way of cooling the body down. The next step is to give them something cool (but not freezing) to drink slowly.
In cases of heat exhaustion this should help the person affected feel better. However, if the person doesn’t improve within about 30 minutes, or they become unconscious at any point, and/or have seizures, call 999.
Sunstroke/heatstroke is potentially life threatening and is classed as a medical emergency.
Sunstroke/heatstroke is potentially life threatening and is classed as a medical emergency. If you see someone with heatstroke/sunstroke seizures, call 999 and ask for an ambulance to come urgently.
It can help the ambulance crew if you are able to tell them if the person you’re with has any health conditions, and if they are taking medication regularly.
Some people, such as older people, young children, and those who have a health condition are at increased risk of heat exhaustion or heat stroke. There may be other important information that you should pass on if you know it. For instance, if the person has been ill lately, especially if they might already be dehydrated, and if they have been exercising in the heat.
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