England's deputy chief medical officer, Thomas Waite, has listed some of the tell-tale signs of heat exhaustion and what can be done to treat the condition. Dr Waite told GMB: “That combination of fluid loss through sweating and through that hard work through your heart pumping, getting more blood to your skin can lead to a range of symptoms, so you can get sweaty, really quite excessive sweating, cramps, nausea and vomiting and dizziness.
“That’s a set of symptoms called heat exhaustion that’s really quite easily treated.
“If you see somebody who’s experiencing those symptoms, get them into the cool, get them into the shade, give them some fluid to rehydrate, it can be water, it can be sports drinks or rehydration fluids, and most people will make a good recovery in about 30 minutes or so.”
