The mercury rarely reaches 30 degrees in the UK but when it does, it's more important than ever to stay hydrated.
As little as a 2 - 3 % drop in hydration can impair your attention, and decision making. We need water to lubricate joints, to metabolize proteins, to insulate the brain, spinal chord and organs. And it's needed to flush toxins from the body.
But, if guzzling 6 - 8 glasses is too much for you, remember, you can eat your water through fruits and vegetables, as well as drink it!