Met Office has predicted the exact time Britain's 'extreme heatwave' will end but issues a brand new warning.Hours after confirming last night (Monday, July 18) into Tuesday was the 'warmest on record' in the UK, the national weather service says bearable temperatures will return tomorrow (Wednesday, July 20).To be precise, 1pm on Wednesday is when swathes of the country will not only cool down but get its first soaking in weeks.READ MORE: Met Office warns of scorching 43C temperatures on 'hottest day in UK history'In true UK weather fashion, caution over the sweltering heat will be replaced by a Yellow thunderstorm warning for the south east of England.According to the Met Office, the extreme heatwave — which is predicted to rocket all the way up to 43C in some parts today — will swiftly turn into flash floods and power cuts.
It comes after the record temperature in the UK since records began with 39.1C recorded in in Charlwood, Surrey today (Tuesday, July 19).
The Yellow warning in place from 1pm to 9pm on Wednesday, outlines the likelihood of flooding and lightning which could result in yet more travel chaos.
Commuters already cut off from work by scorching temperatures impacting rail and bus services, are expected to suffer further transport cancellations due to storms.
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