Over 33, the UK breaks the record for the "hottest May day".

According to Xinhua News Agency, data from the UK Meteorological Office shows that the temperature in the area of London's Heathrow Airport reached 33.5 degrees Celsius on the 25th, breaking the UK's record for the hottest single day in May. Since the UK began keeping meteorological records, the highest temperature in May was 32.8 degrees Celsius, first occurring in 1922 and again in 1944.