This excellent health advice feature is from the NHS Direct travel health guide:
Older people, especially those over the age of 75, are at risk of serious illness, and even death, during very hot weather. In 2003, the heatwave was reportedly responsible for the deaths of around 2,000 older people. There are several reasons for older people being particularly at risk during a heatwave.
Firstly, as we get older, our bodies become less able to recognise hot temperatures. Plus, in older age we have fewer sweat glands and sweat less. Sweating is the body's natural cooling mechanism and therefore not being able to sweat as much means that it is not possible to stay as cool naturally.
Also, it is common in older age to not feel as thirsty. Therefore it is very important to drink plenty of fluids (avoiding tea, coffee and alcohol) during a heatwave, even if you don't feel very thirsty, to avoid dehydration.
Certain medical conditions. which are more common in older age, and some medicines, also add to the risk. Conditions include diabetes, hypertension (high blood pressure) and cardiovascular and peripheral vascular disease. Medicines that can increase the effects of the heat include beta-blockers, diuretics, antidepressants and anti-Parkinson's drugs. If you are taking any of these medicines, do not stop taking them. If you are concerned, see your GP for further advice.
To avoid the effects of the heat, such as heat exhaustion or heatstroke, remember to:
* stay inside when the sun is at its strongest - between 11am and 3pm,
* pull the curtains across any windows that are exposed to direct sunlight,
* open windows if the temperature outside is cooler than inside,
* if you can afford it, consider buying an electric fan,
* wear light, loose clothing,
* drink plenty of cool drinks,
* eat light cold meals,
* wash or shower in cool water,
* when you do go outside, use sun protection lotion of at least factor 15, and
* wear a hat that covers your ears, and if possible, your shoulders.
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