Very Hot Weather

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Icon of hot wather Very Hot Weather

In a very hot environment, our body can cool down itself by increasing perspiration and breathing rate.  However, sweat evaporation also results in the loss of water and salt which are essential for maintaining normal bodily functions.  That explains why people undergoing prolonged strenuous exercise or hard labour outdoors in very hot weather are prone to heat exhaustion or even heat stroke.  In such case, the body's self-regulatory mechanism breaks down and the body temperature may even rise to a fatal level.  In very hot weather, always keep your body condition in check and replenish water and electrolytes regularly.

Besides, pay attention to the safety in using electrical appliances as they may overheat easily under a high temperature.

 

Very Hot Weather Warning

The Hong Kong Observatory will, taking into account factors like the temperature, relative humidity and wind speed, issue the Very Hot Weather Warning as appropriate, so that the public may take precaution against heatstroke.

Yellow rainstorm signals

 

Emergency Information

Preparation

  • Check the weather reports to see if there are any heat-wave risks and warning signals for very hot weather.
  • Learn about the symptoms of heat exhaustion and heat stroke as well as the treatments for them.

 

During a very hot weather

  • Stay in well-ventilated or air-conditioned indoor places.
  • Wear lightweight, light-coloured and loose-fitting clothing.
  • Drink more water.
  • Check regularly on babies, young children and the elderly as they are more susceptible to heat-related illnesses.
  • Do not expose to the sun for a prolonged period of time.
  • Do not stay inside a stationary vehicle with the doors and windows closed.
  • Do not engage in strenuous activities.

Treatment of heat-related illnesses:

  • Move the patient to a shady place.
  • Remove the patient's clothing.
  • Sprinkle water over the patient and help cool him down by fanning him.
  • Monitor the patient's reactions to avoid excessive cooling.
  • If the patient is conscious, provide him with an appropriate amount of water and salt.
  • When necessary (e.g. if the patient is unconscious), convey him to hospital as soon as possible.
  • Call 999 immediately for emergency assistance.