Dehydration in older adults: signs, hot weather precautions and ways to make drinking easier

Thirst can weaken in older adults; worry about incontinence, difficulty getting to the toilet, swallowing problems or memory loss also reduce drinking. Dehydration can lead to constipation, urinary infections, dizziness, falls and sudden confusion. So rather than “they will drink when thirsty”, planned drinking is recommended.

Early signs

• Dark yellow, strong-smelling urine and passing less urine than usual
• Dry mouth and lips
• Dizziness, especially on standing
• Tiredness, weakness, headache
• Constipation

Get medical help without delay for confusion, very little or no urine, a racing heart, fainting, or being unable to keep fluids down because of vomiting or diarrhoea.

8 practical ways to make drinking easier

• Keep a glass always in sight and within reach.
• Build a habit of a glass of fluid with every meal and every medicine.
• Use hourly reminders or a jug marked with the daily target.
• Offer frequent small sips rather than one large glass.
• Offer drinks they enjoy: ayran, herbal tea, fruit-infused water, soup, stewed fruit.
• Water-rich foods: watermelon, cucumber, oranges, yoghurt, soupy dishes.
• Use a light cup with a handle, and a straw or lid if needed.
• Note with the caregiver how much is drunk during the day; a record beats a guess.

Extra precautions in hot weather

During heatwaves, keep the home cool, avoid going out in the hottest hours and choose light-coloured, loose clothing. Call or visit older people who live alone more often on hot days. Weakness, nausea and heavy sweating, or conversely hot, dry skin with a change in alertness, can signal heatstroke; call your local emergency number (112 in Türkiye and across the EU).

A caution for people on a fluid restriction

The doctor may set a fluid limit for some people with heart failure or advanced kidney disease. In that case the doctor’s amount applies instead of the general advice above; ask in advance what to do in hot weather or with diarrhoea. For anyone taking water tablets, plan fluids with the doctor too.