Saturday was the hottest day of the year as temperatures in the Anglia region topped 29°C but it's likely to be even hotter on Sunday.
The thermometer peaked in East Anglia at 29.3°C (84.7°F) in Santon Downham on the Suffolk-Norfolk border at just after 3.15pm.
It was among the warmest locations in the British Isles on Saturday although the hottest place was Teddington in West London where it reached 30.2°C (86.4°F).
It was the hottest day of the year so far both in the UK and in the Anglia region.
Until Saturday the hottest June day in the Anglia region this year had been the 14th when it reached 26.5°C at Little Paxton in Cambridgeshire and the hottest day of the year had been 27 May when it was 27.0°C in Cromer and Weybourne in Norfolk.
It is likely to be even hotter on Sunday and Monday with temperatures forecast to reach 30-32°C or perhaps even 33°C (91°F).
It the temperature reaches 33.8°C or higher it will be the hottest June day in Britain since the heatwave summer of 1976.
Currently the Met Office says the chance of reaching that milestone is only 30%.
Maximum temperatures in the Anglia region on Saturday 17 June 2017
- 29.3°C at Santon Downham, Suffolk
- 28.8°C at Wittering, Cambridgeshire
- 28.8°C at Woburn, Bedfordshire
- 28.7°C at Cavendish, Suffolk
- 28.7°C at Holbeach, Lincolnshire
- 28.5°C at Writtle, Essex
- 28.3°C at Marham, Norfolk
- 28.2°C at Thurleigh near Bedford
- 27.9°C in Cambridge
- 27.9°C in Northampton
- 27.7°C at Houghton, Norfolk
- 27.0°C at Stowe, Buckinghamshire
- 26.0°C at Weybourne, Norfolk
- 25.5°C at Cromer, Norfolk