The Met Office has issued its second ever red warning for extreme heat as temperatures are expected to reach at least 39C, with some areas potentially reaching 40C.
It will come into effect on 09:00 BST on Wednesday to 21:00 Thursday for parts of England and Wales, with substantial disruption to travel, critical infrastructure and widespread damage to property a possibility.
This heatwave is not limited to the UK, with western Europe also affected. In France, nearly 850 schools are closed due to high temperatures.
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