The UK has seen its hottest August day since 2003 as temperatures soared to 36.4c at Kew Gardens and Heathrow on Friday.
Temperatures are forecast to rise further to 37C (98.6F) in London and the South East with a heatwave expected to blanket most of the country until Sunday.
The heat comes just a week just after the UK recorded a yearly high of 37.8C at Heathrow.
The warm weather is expected to last well into the night with temperatures staying above 20c until Sunday.
The threshold for a heatwave is three days of temperatures over 25C (77F) across most of the nation and 28C (82.4F) in London.
The coastguard has warned people to stay safe on beaches as the temperatures in the UK rose above Ibiza and Tenerife.
HM Coastguard said around 70 call-outs had been made by midday on Friday, which is “above average for this time of year”.
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