Hydration in Extreme Heat: The UAE Reality
Dehydration is one of the most common yet underestimated health issues in the UAE. With summer temperatures exceeding 48°C and humidity above 80%, your body loses water at rates most people don't account for - even when indoors.
How Much Do You Actually Need?
The standard "8 glasses" advice is insufficient for UAE residents.
| Activity Level | Daily Requirement | Notes |
|---|
| Sedentary (office, AC) | 2.5-3 litres | AC dehumidifies air, increasing insensible losses |
| Moderate activity | 3-4 litres | Add 500ml per 30 min of exercise |
| Outdoor workers | 4-6 litres | Must include electrolytes |
| Athletes (summer) | 5-8 litres | Structured hydration protocol essential |
| Pregnant women | 3-3.5 litres | Increased blood volume demands |
| Children | 1-2 litres (by age) | Higher risk - monitor closely |
Signs of Dehydration (Often Missed)
Mild (1-3% body water loss):
- Thirst (by the time you're thirsty, you're already 1-2% dehydrated)
- Darker urine
- Mild headache
- Reduced concentration
- Dry lips and mouth
Moderate (3-5% loss):
- Significant headache
- Dizziness when standing
- Rapid heartbeat
- Muscle cramps
- Reduced urine output
- Fatigue
Severe (>5% loss - medical emergency):
- Confusion or irritability
- Very dark or no urine
- Sunken eyes
- Rapid, weak pulse
- Fainting
- Call 998 or visit emergency immediately
The UAE Hydration Challenges
AC paradox: Air conditioning removes humidity, causing significant water loss through breathing and skin evaporation - without sweating. You can become dehydrated without feeling hot.
Coffee culture: UAE has high caffeine consumption (Arabic coffee, specialty coffee shops). Caffeine is a mild diuretic - while moderate intake counts toward hydration, excessive amounts (>400mg/day) increase fluid loss.
Ramadan: Fasting during summer months in the UAE means 14-15 hours without water in extreme heat. Pre-dawn and post-sunset hydration strategies are critical.
Swimming: You still sweat while swimming - and you don't notice it. Swimmers in Dubai's outdoor pools can lose 1-2 litres per hour.
Practical Hydration Strategies
Morning routine:
- 500ml water immediately upon waking
- Before coffee, not after
- Add lemon or electrolytes if desired
Throughout the day:
- Keep a 1-litre bottle visible at your desk
- Set hourly reminders until habit forms
- Drink before, during, and after meals
- Choose water-rich foods (cucumber, watermelon, lettuce)
Exercise protocol:
- 500ml 2 hours before
- 200-300ml every 15-20 minutes during
- 150% of weight lost after (weigh before and after)
- Include electrolytes for sessions >60 minutes
Electrolyte balance:
Plain water alone isn't enough during heavy sweating. You need:
- Sodium (primary electrolyte lost in sweat)
- Potassium (muscle function)
- Magnesium (prevents cramps)
- Options: electrolyte tablets, coconut water, or homemade (water + pinch of salt + squeeze of lemon)
Special Populations
Children: Cannot regulate temperature as efficiently. Offer water every 20 minutes during outdoor play. Watch for irritability, flushed skin, and reduced activity.
Elderly: Thirst sensation diminishes with age. Schedule water intake rather than relying on thirst signals.
Pregnant women: Blood volume increases 50% - hydration is critical for amniotic fluid, placental function, and preventing UTIs.
When Dehydration Needs Medical Attention
Visit Al Das if you experience:
- Inability to keep fluids down (vomiting)
- Diarrhoea lasting more than 24 hours
- Signs of moderate-severe dehydration
- Recurrent dehydration despite adequate intake (may indicate underlying condition)
- Dark urine persisting despite increased water intake
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