There are health warnings for millions of people across north America and southern Europe, as possible record-breaking high temperatures are forecast in the next few days.
It’s the second extreme heatwave to hit southern Europe this year, intensified by global warming.
On the Spanish island of La Palma fires are burning out of control and in Italy people are being advised to stay indoors.
Clive Myrie presents BBC News at Ten reporting by Sophia Bettiza.
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