The hottest September since 1911 and we have seen the hottest day of the year so far at 34.4C ( 93.9F ) But what is the science behind it?
Hurricane Hermine, which hit Florida in early September, pushed large kinks into the jet stream - large atmospheric waves which lock our weather patterns in place. For Spain and Portugal, that meant temperatures rising to 10C above average last week.
A large area of high pressure centred over northern Europe has brought southerly winds, which have drawn this warm air northwards, reaching our shores today. And we have mainly clear skies across much of England, so we're topping it up ourselves.
We saw 31C in September in 1973, and in 1961, in Gatwick, the temperature recorded was 31.6C. It's very doubtful that we will break the all-time record though, as a 1906 heat wave brought September temperatures of 35.6C (96.08F).
The earlier high temperatures meant that Britain was hotter than forecasts for Madrid and Los Angeles.