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Let's be careful of heat stroke

Last Updated March 1, 2024

What is Heat Stroke?

Heat stroke is the loss of water and salt in the body due to sweating a lot of water and salt in the body, the body temperature cannot be adjusted, and the body becomes ill. As the temperature and humidity increase, more people suffer from heat stroke.
Typical symptoms of heat stroke include laziness, dizziness, headache, excessive sweating, and nausea.
If you have hyperthermal temperature, convulsions, or impaired consciousness, it is severe. It can be life-threatening. Please see a medical institution right away.

Prevention of Heat Stroke

Avoid the heat

  • When going out, use parasols and hats to avoid direct sunlight. Sweat and wear clothes made of highly breathable materials.
  • When you are indoors, use a fan or air conditioner to manage temperature and humidity. Avoid direct sunlight entering through windows with curtains or blinds.

Take water and salt

  • Even if you don't feel thirsty, take water frequently.
  • If you sweat a lot, take water and salt with a sports drink.

Build a body in preparation for the heat

  • Sweat with moderate exercise. Before exercising, replenish water and salt.
  • If you are ill, such as lack of sleep, hangover, or cold, you will be more likely to suffer from heat stroke.

When you suffer from heat stroke (first aid treatment)

  1. Evacuate in a cool place in the shade or air conditioner
  2. Take off your clothes to release heat, or cool your body to lower body temperature.
  3. Take water and salt (if you are unable to hydrate on your own, transport it to a medical institution immediately)

Be careful

  • About half of heat stroke patients are elderly people aged 65 and over. Elderly people are more likely to suffer heat stroke because they are less likely to feel heat and thirst. In addition, symptoms tend to be more severe when you suffer from heat stroke.
  • Children are more susceptible to heat stroke because their thermoregulatory function is not well developed.
  • Be careful, as some children and people with disabilities may have difficulty complaining of poor physical condition.
Contact information
Contents Contact information
Thing about heat stroke

Health and Social Welfare Bureau Health Promotion Section (* Japanese only)
Phone: 045-671-2451
Fax: 045-663-4469
Email address: kf-kenkosuishin@city.yokohama.jp


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