Brits are being told to avoid two drinks throughout the summer, as they can often make you feel worse. Drinks that are often a go-to during the summer can cause dehydration and disrupt your sleep, so it might be best to stick to water on the hottest days. (Image: Getty)What drinks should you avoid during the summer? The British Red Cross has urged people to avoid drinking caffeinated drinks and alcohol when it is hot out. The British Red Cross added that sticking to a normal routine can also help you throughout the heatwave.