Uploaded June 2026 | Updated September 2026, 3 weeks ago

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With Europe in the grip of a mega heatwave, many people will be relying on fans rather than air conditioning for comfort and safety, so it is important to be aware that, as it gets hotter, fans can flip from cooling you to warming you.

But the temperature at which you should turn them off depends on several factors, including your age and the humidity level.

Tap the link for more tips on how to stay cool
newscientist.com/article/2531606-you-should-turn-off-fans-when-its-too-hot-but-how-hot-is-too-hot