As the UK faces a record-setting heatwave with red weather warnings issued, people are being urged to spot the signs of heat-related illnesses. Long periods in the sun can lead to heat exhaustion, a condition that occurs when your body overheats. Symptoms include nausea, headache, heavy sweating and dizziness. According to the NHS, heat exhaustion can be treated by moving the affected person to a cool place, removing unnecessary clothing, drinking cold drinks and keeping the skin cool. If not treated, it can turn into heat stroke, which can be potentially fatal. Symptoms include a very high tempature, hot skin without sweating and a fast heartbeat. You must seek medical help if you spot the symptoms of heatstroke.

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A public health expert has revealed some of the key warning signs and ways to keep cool when the heat and humidity get too high