To avoid dehydration, drink plenty of water. This will help replace the fluids the body loses in the heat. Aim to drink more if you exercise or sweat more than usual. Symptoms include headaches, feeling dizzy, tired and irritable, a dry mouth, dry eyes and lips and dark strong smelling urine.
Stay out of the heat at the hottest time of the day. If you have to go out, wear loose clothing, stay in the shade and carry plenty of water. Cool yourself with a tepid shower or a bath, and splash the back of your neck and face with cold water. Watch for signs of heat, which if ignored can lead to heat stroke. The symptoms include feeling faint, nausea, headache, tiredness, confusion and a rapid heartbeat. Immediate treatment is to lie down in a cool place, with your feet slightly raised. Loosen your clothing and drink cold water.Being overweight is also a risk factor, as it can mean your body retains more heat.