Forecasters have issued weather warnings across most of the UK as thunderstorms and torrential rain roll in.
Three separate severe warnings for storms and rain are in place in England, Scotland, Wales and Northern Ireland on Monday, with up to 80mm of rain possible in some parts.
A further yellow warning for thunderstorms is in place on Tuesday, before temperatures soar towards the mid-30s.
By Friday, the mercury could peak at about 33C, with Glastonbury Festival-goers expected to see some of the hottest temperatures in Britain.
It comes amid a heatwave that has been forecast across Europe, potentially bringing record temperatures of 40C to the continent.
Met Office meteorologist Simon Partridge told the Standard: âOn Monday we are getting three weather warnings across the UK. Two run from midnight to midnight.
âThe first is a rain warning in eastern Scotland. 20 to 40mm of rain is expected to fall quite widely and some isolated places could see up to 80mm.
âThe second warning is a thunderstorm warning for the majority of England and Wales. 20mm of rain is expected to fall widely with 60mm is possible in isolated spots.
âA final thunderstorm warning is in place for Northern Ireland.
âThere is a lot of warm and humid air across southern parts of the UK which will allow the thunderstorms to develop.
âThe band of rain across Scotland isnât really going anywhere but away from Scotland there will be a mix of sunny spells and storms. It will be warm, with temperatures peaking at about 27 or 28C in East Anglia.
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âA more focused patch of thunder storms will move over the country on Tuesday, with another weather warning in place from midnight to midnight for southern and eastern parts of England.
â60mm of rain could fall in some places but the rest of the UK will be dry with sunny spells. Temperatures could peak again at 28C in the south."
The rest of the week will see warm and sunny weather for most as the mercury continues to climb, Mr Partridge added.
He said: âFrom Wednesday high pressure will become more dominant so there will be a reduced risk of showers and thunder, there will be more sunshine and warmer temperatures.
âBy the time we get to Friday the hotter temperatures will be further to the south and west and we could see temperatures of 32 or 33C at Glastonbury.â