How are kids coping with the heat in Europe?
The UK has seen the record for the hottest June day ever with temperatures reaching 36.7C in the south of England.
But it's not just the UK experiencing a heatwave, cities across Europe are also dealing with extreme heat.
France recorded its hottest day ever and temperatures in the capital, Paris, hit nearly 40C.
The children in Paris, France and Vienna, Austria told Newsround what it's been like there.