How much water should you drink in a heatwave?

Large parts of the UK are set to experience sizzling temperatures this weekend, so remember to stay hydrated.

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While symptoms like thirst and light-headedness may seem minor, it's important not to underestimate the seriousness of dehydration - and to know how to keep our bodies properly hydrated.

HOW MUCH WATER SHOULD THE AVERAGE ADULT DRINK DURING A HEATWAVE, AND DOES THIS DIFFER FROM NORMAL RECOMMENDATIONS?

"It is well known that most individuals do not consume enough water," recognises Dr Angela Rai, GP at the London General Practice. "It is recommended to drink around eight glasses of water per day, which equals around 1.5-2 litres per day.

"The ideal water intake varies on factors such as age, underlying health conditions, medicines taken regularly, and activity levels, but in general men may need up to 3.7 litres a day and women 2.7 litres a day."

However, in hot weather and particularly during a heatwave, everyone's water requirements will go up.

"We need to drink up to around three litres a day (not including hidden sources) to replenish fluids we lose through sweating," advises Rai. "It is important to space this out throughout the day and not to drink excessive amounts all at once. Start your day with a glass of water first thing in the morning to help rehydrate your body after sleep.