Summer heatwaves can place considerable strain on older adults. As we age, the body’s ability to regulate temperature becomes less effective, sweating may become less efficient, and the sensation of thirst may also diminish. As a result, dehydration can develop without being noticed, while potentially having serious effects on the cardiovascular system and kidney function.
In older adults, fluid loss may increase not only because of high temperatures but also due to certain medications, such as diuretics, which can contribute to disturbances in the body’s electrolyte balance. The first signs are often not thirst, but symptoms such as weakness, dizziness, confusion or general physical deterioration.
Regular laboratory testing can help detect changes in the body’s balance at an early stage. Kidney function markers, liver function tests, electrolytes – particularly sodium and potassium – as well as a complete blood count can provide valuable information about hydration status and overall health.
Laboratory testing is particularly advisable for people with cardiovascular disease or diabetes, those taking diuretics, and anyone who has experienced dehydration in the past. During the summer months, even a routine check-up can contribute to preventing more serious complications.
Frequently Asked Questions
Why does the sensation of thirst become weaker with age?
As we age, the nervous system’s response responsible for triggering thirst becomes less sensitive. As a result, older adults may be less aware that they are thirsty and can become dehydrated more quickly.
Which laboratory tests are recommended during the summer?
A complete blood count, kidney function tests, liver function tests and electrolyte testing can all provide useful information.
When should I seek medical attention?
If dizziness, confusion, weakness or recurrent episodes of feeling unwell occur during periods of extreme heat, medical attention should be sought.