As the UK braces itself for another heatwave Which? has shared a trick for keeping drinks cool in hot weather – and the science behind it is fascinating

An amber extreme heat warning has been issued for much of England as the UK braces for another heatwave. Parts of southern England and south-eastern Wales are under the amber heat warning from 1am on Monday until 11.59pm on Wednesday, with the Met Office cautioning that the scorching spell could trigger adverse health effects, travel disruption and possible power cuts.

Details of the alert stated: “Significant impacts are likely across health and social care services due to the high temperatures, including; a rise in deaths, particularly among those aged 65 and over or with health conditions. There may also be impacts on younger age groups.”

The warmer weather also sees many Brits spending more time outdoors enjoying activities such as gardening, sunbathing and dining al fresco.

Many will also seize the chance to socialise, heading to a beer garden or hosting a barbecue at home with friends and family.

How to keep drinks cool during a heatwave?

One of the most crucial things people need to do in hot weather is stay cool, and a simple way to achieve this is by drinking plenty of fluids and avoiding dehydration.

As the mercury rises, Which?, the UK’s consumer champion, has offered Brits a nifty tip for keeping drinks cooler for longer while the sun blazes down.

They posted a video on TikTok advising people to add one simple ingredient to ice that keeps drinks cooler for longer. They said: “We tested eight ways to chill drinks fast, and the quickest was simple: ice, water and salt.

“Salt lowers the freezing point of water, creating an icy slush that can drop below 0C and cool drinks faster. Gotta love a bit of science eh! ?”.

NHS warning over dehydration during heatwave

It is widely understood that hot weather can heighten the risk of dehydration, particularly for those with underlying health conditions such as diabetes or those taking certain medications.

People are advised to consume between 6 to 8 cups or glasses of water every day. The signs of dehydration include; feeling thirsty, headache and feeling light-headed, dark yellow, strong-smelling pee, peeing less often than usual, feeling dizzy or lightheaded, feeling tired, a dry mouth, lips and tongue and sunken eyes.

These could be indicators of severe dehydration requiring immediate medical attention. You can call 111 or get help from 111 online.

Call 111 if you need advice for a child under 5 years old.