London Heathrow Airport recorded a temperature of 33.1°C, the highest in the UK on that day. This continues a trend; Heathrow hit 40°C in 2022. Experts attribute this to the 'urban heat island' effect, where built-up areas like Heathrow, with its asphalt runways and buildings, absorb more heat than rural areas. London's dense urban environment further intensifies this effect.

Prepared by Rachel Morgan and reviewed by editorial team.