Dehydration is a genuine and common health problem in Bangladesh, particularly during the hot season from April to September when temperatures regularly exceed 35°C and humidity makes the heat feel worse. The standard advice to 'drink 8 glasses a day' is a simplification — your actual requirement depends on your body weight, activity level, and the environmental conditions you spend time in.
The Basic Daily Water Requirement Formula
The most commonly cited evidence-based baseline is 35 ml of water per kilogram of bodyweight per day for a moderately active adult in a temperate climate.
Base daily water intake = Body weight (kg) × 35 ml Example: 65 kg adult Base intake = 65 × 35 = 2,275 ml ≈ 2.3 litres per day Adjustments: + 500–750 ml for each hour of moderate exercise + 500–1,000 ml for high heat (35°C+) + 500 ml if working outdoors in Dhaka summer Same adult on a hot day with 1 hour of exercise: Total = 2,275 + 750 + 750 = 3,775 ml ≈ 3.8 litres
Signs of Dehydration
Many people in Bangladesh habitually drink less water than their body needs without feeling acutely thirsty — thirst is a late indicator of dehydration, not an early one. More reliable indicators include urine colour.
Urine Colour Guide to Hydration
| Urine Colour | Hydration Status | Action |
|---|---|---|
| Pale yellow (like lemonade) | Well hydrated | Maintain current intake |
| Medium yellow | Mildly dehydrated | Drink 1–2 more glasses |
| Dark yellow | Moderately dehydrated | Drink water now; increase intake today |
| Amber / orange | Significantly dehydrated | Drink water immediately; rest in shade |
| Brown | Severely dehydrated or possible kidney issue | Seek medical attention |
Water Sources Beyond Plain Water
All fluids contribute to daily hydration — not just plain water. Dal, rice, tea, milk, fruit, and vegetables all contain significant water. A typical Bangladeshi diet with multiple servings of rice and vegetables may already provide 500–700 ml of water through food. Caffeinated drinks like cha (tea) have a mild diuretic effect but still contribute net hydration — the diuretic effect is smaller than the fluid provided.
Tip
Keep a 1-litre water bottle visible on your desk or workspace and refill it twice before the end of the workday. This simple habit removes the need to 'remember' to drink water — the visible bottle serves as a constant prompt. People who keep water in front of them consistently drink more than those who fetch it from another room.