Is it dangerous to sleep with an electric fan on at night?

Health & Fitness
10 Jul 2026 • 7:32 PM MYT
The Independent
The Independent

The world’s most free-thinking newspaper

Is it dangerous to sleep with an electric fan on at night?

  • With temperatures rising, many of us are relying on electric fans to stay cool – particularly at night when it can feel impossible to sleep in the sweltering heat. But experts warn there are some dangers to watch out for.
  • The UK Health Security Agency (UKHSA) warns that you should only use electric fans if the air temperature is below 35°C, and not to aim the fan directly at your body as this can lead to dehydration.
  • Electrical Safety First also advises that electric fans can pose fire risks if they overheat; so users should ensure their fan has a UK 3-pin plug with a fuse and avoid buying second-hand models.
  • They caution not to leave a fan running overnight, or when you are out the house. You should always unplug the fan from the socket when not in active use.
  • Additionally, it is also crucial to monitor for warning signs such as burn marks, 'arcing' sounds, fuses blowing, circuit breakers tripping, or the fan feeling hot to touch; if any of these occur, immediately unplug the fan and contact the retailer, manufacturer, or a qualified repair technician.

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