Be careful of heat stroke

Approximately 50% of those who were transported by ambulance due to heatstroke are elderly people aged 65 or older, and about 60% of the outbreaks occur in residential areas such as houses, and it seems that there are many days with high temperature and humidity .

Leaflet "Elderly people should be careful of heat stroke" (PDF file; 1261KB)

Elderly people prone to heatstroke

  • Low water content in the body, prone to dehydration
  • less water in the body than when young
  • Poor subjective symptoms of heat
  • Decreased body's ability to regulate heat
  • You are prone to heatstroke due to your chronic illness or medication

Symptoms of heat stroke

Symptoms of heat stroke




  • dizzy
  • Lightheadedness
  • muscle pain
  • I can not stop sweating
  • headache
  • Feeling tired
  • powerless
  • convulsions
  • Can not walk
  • unconscious

Points to prevent heatstroke

Replenish lost water

  • Goal is 1,200ml other than meals

Creating an environment that does not become hot and humid

  • block the sun
  • improve ventilation
  • Room temperature should not exceed 28°C

Building physical strength to withstand the heat

  • Eat well
  • Create a comfortable sleeping environment

Beware of hidden dehydration

Hidden dehydration is the early or pre-stage state of dehydration.

When a large amount of sweating continues and dehydration occurs, the sweating stops, causing the body temperature to rise and heat stroke to develop.

Hidden dehydration causes changes such as ``swelling remains on the shins of the legs'' and ``the inside of the mouth is sticky''.

Let's replenish water and salt diligently and use the air conditioner well.

Pamphlet on hidden dehydration (PDF file; 651KB)

Contact information

1-16-21 Kasuga, Bunkyo-ku, Tokyo 112-8555

Bunkyo Civic Center 9th floor south side

Elderly Welfare Division Regional Comprehensive Care Promotion Section

Phone number: 03-5803-1843

Fax: 03-5803-1350

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