South Korea has had its hottest day since records began. Sunday was the fifth day in a row that the country reached more than 40C degrees.
Heatwaves are still having a huge impact in Europe – with Italy putting nearly all of its major cities on the highest "red" alert for high temperatures.
So – how much of the world is being impacted – and what happens next?
00:48 Where has been hit
01:06 Washington State fires
02:42 Record South Korea temperature
03:39 Europe fires latest
05:11 How much of the world is affected?
06:05 How unusual is this heat?
06:37 Implications – Hungary power
08:17 Implications – food and farming
09:43 Is this world heating up?
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