What’s making this heatwave so uncomfortable - especially at night

WorldEnvironment
25 Jun 2026 • 10:02 PM MYT
The Independent
The Independent

The world’s most free-thinking newspaper

What’s making this heatwave so uncomfortable - especially at night

  • Western Europe is experiencing an unprecedented heatwave in June, with temperatures soaring above 40 degrees Celsius in many areas, significantly earlier than the traditional summer months.
  • The extreme conditions are breaking numerous temperature records across the continent, including the UK's highest June minimum temperature of 23.5°C in Cardiff and its hottest June day at 36.1°C in Gosport.
  • France has been particularly affected, with three-quarters of the country under a red alert and the national thermal indicator reaching an all-time high of 30°C, with forecasts predicting 40-42°C.
  • Other nations are also facing record-breaking heat, such as Germany equalling its warmest night at 26.2°C and Spain recording an all-time high of 43.7°C in the normally cooler Cantabrian region.
  • What's making this particular heat wave so uncomfortable is the scale of the humidity, which inhibits the body's natural cooling via sweat. That is a particular problem at night, especially in those countries where air conditioning is not really a thing, such as the U.K.

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