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In hot weather, feeling unwell, dizzy, anxious, very thirsty, or having painful muscle spasms could be signs of heat exhaustion.

Heat exhaustion is not usually serious if you can cool down within 30 minutes.

  • Rest immediately in a cool place
  • Drink plenty of water
  • Use rehydration solutions if suitable

If you are unable to cool down after 30 minutes this could turn into heatstroke.

Heatstroke is an advanced form of hyperthermia and can be life threatening. Look out for:

  • Body temperatures over 104°F or 40°C
  • Headaches
  • Nausea
  • Dry skin and no sweating
  • Agitation
  • Heavy breathing

The symptoms are often the same in adults and children, although children may become floppy and sleepy.

Treat heatstroke as an emergency. If you still feel unwell after 30 minutes of symptoms starting, get help by calling NHS 111.