Youths were seen inhaling from balloons alongside beach revellers who were arrested in Bournemouth today as Brits flocked to the coast for some respite from the overbearing 40C 'heat dome'.The young boys were seen passing inflated balloons - which often contain nitrous oxide or 'hippy crack' - to each other on the crowded beach, where hundreds were trying to cool off from the UK's 'hottest day ever'.Others were seen handing around shisha pipes next to toddlers who were trying to enjoy the bay. Meanwhile, a man was seen escorted by officers as sweltering beach goers looked on - Dorset Police have been contacted for further information. Emergency services were also called to Bournemouth beach yesterday afternoon when a female bather in her 60s was believed to have been in the sea with a child and suffered a medical episode. She died after she was brought back to land despite paramedics' efforts. The brutal 'heat dome' claimed a further two victims - a two-year-old and four-year-old were found unresponsive by their mother, 33, on Monday afternoon in the town of Carpentras, southern France, in a car parked outside their grandmother's house.It has been reported that the mother forgot about her children while she was unpacking shopping, with the children suffering cardiac arrests as temperatures reached a sweltering 40C.The ⁠double tragedy occurred as temperatures soared across Western Europe, driven by a mass of hot air moving north from the Sahara, fuelled by a strong high‑pressure ​system known as the 'African anticyclone'.Young boys were seen passing inflated balloons - which often contain nitrous oxide or 'hippy crack' - to each other on a crowded Bournemouth beach A man was being escorted by officers as sweltering beach goers looked on Others were seen passing around shisha pipes next to toddlers who were trying to enjoy the beach