It's thought a record temperature of 48.8 degrees could be broken.
A midlands man living in Spain says the humidity is the most difficult aspect of an ongoing heatwave.
Southern Europe is experiencing its second heatwave at the moment, and Irish people on holiday there are bracing for extreme conditions.
The UN weather agency says a record temperature of 48.8 Celsius set in Sicily two years ago, could be broken.
While authorities in Greece have been battling wildfires.
Rhode's Dermot Moore is living in Cabo Roig in Spain - he says the streets are quiet until the evening:
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