The heatwave is returning for round two in London and the South East.
Temperatures could climb back up to 31C this weekend with almost unbroken sunshine.
On Friday, temperatures are likely to hit at least 29C and possibly 30C in southern parts of the UK.
Holidaymakers heading to Spain and Portugal were warned of an extreme heatwave which could see the hottest-ever temperatures recorded in continental Europe.
The current record of 48C in Athens, Greece, in 1977 could be broken as wave of blisteringly hot air sweeps in from Africa.
Temperatures crept into the low 40s on Wednesday and are expected to rise and peak at the weekend, with the highs expected inland rather than in coastal areas.