Today marks the hottest September day for nearly 70 years as temperatures reached a scorching 32C at Heathrow .
The late heatwave brought highs of 32.2C in west London, recorded at around lunchtime on Tuesday (September 13), according to the Met Office.
It's the first time time temperatures have soared to 32C in September since 1949.
Hottest in recent years
Temperatures did sail above 30C (86F) in September 2006 in Kew Gardens, when it reached 30.5C (87F) on September 11.
The highest ever September temperature recorded was in 1906 when 35.6C (96.1F) was recorded in in Bawtry, South Yorkshire.
Most of the country has enjoyed temperatures in the high 20s, however a North/South weather divide could appear when thunderstorms hit the North while the South basks in late summery sunshine.
Soaring temperatures have sparked health warnings ahead of what is now confirmed as the hottest September day in years, but warnings of rain are in place for Northern England and South East Scotland.
Any outbreaks of rain could become torrential with a chance of thunder, and as much as 30mm (1 inch) could fall in some places, with a risk of flash flooding .
The heatwave was expected to hit the East of England, the South East, the capital and the East Midlands, and a "heatwave Level 2 status" was issued from Monday evening.
Health warnings issued
Public Health England (PHE) put out warnings in anticipation of the scorching temperatures, urging caution over the coming days and nights.
They also pointed to the the risks to older people, those with underlying health conditions and people with young children.
Heathrow reaching that temperature means it's been hotter here than in Bangkok, Ibiza and Marrakech in Morocco.
'Drink plenty of fluids'
Joe Mulligan, head of first aid education at the British Red Cross, said: "Most heat disorders occur because someone has been over-exposed to heat or has over-exercised for his or her age and physical condition.
"Simple steps such as avoiding exposure to the hottest time of the day, drinking plenty of fluids and even simply wearing a hat on hot days can all make a real difference.
"As we're in September, the sun may not be as strong but the temperature is still high. People will be losing fluids more quickly, especially if they're exercising outside, so it's important to keep hydrated.
"If someone does become dehydrated give them plenty of fluids to drink. Water is good, but coconut water, milk and even tea will do the trick."