“It’s best to do as many Europeans do and recalibrate the day,” Owen said. “The early morning or the evening, through to the early hours, is when the days are at their coolest, so it’s best to save any walking around for these times, if you can, to avoid the heat. It means a shorter night’s sleep, but you top it up in the middle of the day ― as the Spanish do, build a ‘siesta’ into your day. It’s a great way to have more energy to experience the nightlife, and is good for your health too.”
Article source: https://www.huffingtonpost.co.uk/entry/heatwave-sleep-water-exercise-clothes_uk_6a3a8293e4b0488a51af883d