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Let's be careful about heat stroke

Last Updated December 13, 2024

About the start of operation such as "Heat Stroke Special Warning Alert"

　The Ministry of the Environment will start operation of the “Heat Stroke Special Warning Alert” on April 24, 2024.
　This special heat stroke alert is announced by the Minister of the Environment when the temperature is particularly high and there is a risk of serious health damage due to heat stroke.
　In the area where the special alert for heat stroke is announced, serious health hazards may occur. Actively carry out voluntary heat stroke prevention activities. In addition, please watch over and call out to family and the people around you.
　In addition, the “Heat Stroke Warning Alert” jointly announced by the Ministry of the Environment and the Japan Meteorological Agency will start operation in 2024 on April 24.

<Operation period of heat stroke special alert / heat stroke alert alert>
　April 24, 2004-October 23, 2004

・Ministry of the Environment heat stroke prevention information site (heat stroke warning alert, heat stroke special alert, etc.) (outside site)
[Reference] About information dispatch in Ministry of the Environment heat stroke prevention information site (PDF: 1,256KB)
・About heat stroke caution alert, heat stroke special caution alert (PDF: 114KB) (Ministry of the Environment document)
・Heat stroke special alert poster (PDF: 626KB)

In Yokohama City, when the value of the heat index in Kanagawa Prefecture is predicted to be 33 or more, information on heat stroke alert alerts is distributed via disaster prevention information e-mail.

Cool share spot

Cool share spot logo mark
Logo mark of cool share spot

When citizens go out, we will open a cool share spot (*) from June 1 as a place to temporarily overcome the heat.
The initiative period is from June 1 to September 30, Reiwa 6. Please take advantage of the cool share spot near you as a measure against heat stroke.
For details such as opening hours and usage conditions, please refer to the "Cool Share Spot Facility List" and "Cool Share Spot Map" below.
Please check it out.

※Utilizing existing facilities such as chairs and benches in facilities that have cooling equipment and can be partially used during opening (business) hours, citizens and other people take a break when going out. It is a place where you can do it.

Map image
Image of the map

List of Cool Share Spot Facilities (as of September 20) (PDF: 467KB)
Cool share spot map (as of September 20) [Disclosed in 2024]

＊The facilities marked with an “*” in Name of the facility in the list of facilities require admission fees.
＊In some facilities, registration may be required for use or reception may be required.
＊Cool Share Spots do not provide commercial beverages or foodstuffs.
＊When using the Cool Share Spot, please follow the manners and use each other so that everyone can spend a comfortable time.
＊Please note that depending on the situation of the facility, even if it is lower than the outside temperature, only a fan or the effect of air conditioning may be weak.
＊The facilities may be closed temporarily.

Heat stroke prevention points

1 Ingest water frequently

・Even if you don't feel thirsty, let's drink water frequently.
※Alcohol has a diuretic effect, leading to dehydration.
・If you sweat a lot, replenish water and salt with sports drinks.
・Don't drink a lot at once, and let's drink in small portions.

2 Ingenuity of clothes

・Let's loosen the collar and wear well-ventilated clothes.
・When you go out, use a hat or parasol.
・Let's absorb sweat and make clothes of materials with good breathability.

3 Avoid heat

・Avoid direct sunlight and walk in the shade.
・Avoid working under the scorching sun or under high temperature and humidity or intense exercise as much as possible.
・Don't overdo it and use air conditioning such as air conditioners.
・Let's check the temperature and humidity of the room.

Health promotion from around 4th

・Get enough sleep and try to have a well-balanced diet.
・Don't overdo it when you feel sick.
・Create a habit of exercising lightly for a short time and get used to the heat.
※Let's refrain from unreasonable exercise.
Heat stroke prepared by the Ministry of the Environment is increasing. Points for prevention (Flyer A4 both sides) (PDF: 1,425KB)
Yokohama-shi, Otsuka Pharmaceutical making Let's take measures against heat stroke by frequent hydration (PDF: 1,922KB)

Symptoms of heat stroke

Symptoms of heat stroke
Severity	Symptoms
Mild illness	Dizziness, muscle pain, heavy sweating※
Moderate disease	Headache, mood discomfort, nausea, vomiting, malaise, collapse
Severe	Disorder of consciousness, convulsions, limb movement disorders, high body temperature

※If heat stroke is severe, there is no sweat and the skin becomes dry, so it is important not to judge only by sweat.

First Aid

・Evacuation to a cool environment
⇒Rest in an air-conditioned room or in a well-ventilated place in the shade.
・Undressing and cooling
⇒Take off your clothes and escape heat, bathe in water, blow the wind, cool with ice, etc. to lower your body temperature.
・Replenishment of water and salt
⇒When vomiting, avoid excessive intake, as there is a risk of aspiration.
※Avoid alcohol and caffeine, as they may increase urine volume and lead to dehydration. Oral rehydration solutions (a mixture of salt and glucose in water) and sports drinks that can also supply salt lost by sweat.

The inability to hydrate on your own is a guide for transporting to medical institutions. Let's respond as soon as possible before it becomes severe.

Let's be careful about this point

Pay attention to changes in your physical condition every day.
Always pay attention to changes in yourself and your surrounding physical condition. Elderly people, children, and people with disabilities need special attention.

Approximately half of heat stroke patients are older than 65 years old.

Elderly people have reduced sensory function for heat and lack of water and body adjustment function for heat.
Since heat stroke often occurs indoors, check the temperature and humidity in the room frequently and use the air conditioner without feeling the heat.
Prepared by the Ministry of the Environment and the Ministry of Health, Labour and Welfare Measures against Heat Stroke for the Elderly (Flyer A4 Both sides) (PDF: 1,462KB)

Consideration should be given to those who have difficulty complaining of poor physical condition.

Pay attention to the physical condition of those who have difficulty complaining of poor physical condition, such as small children and people with disabilities.
Care must be taken for small children because their body temperature control function is not yet fully developed and are susceptible to heat stroke.
If you have a disease, your body temperature regulation function may be reduced. It is important to pay attention to changes in your physical condition.
Created by Otsuka Pharmaceutical Co., Ltd. Let's be careful about heat stroke (for children, protector, leader) (PDF: 1,256KB)

When you get lost or have trouble

Emergency consultation center

#7119 If you are unable to connect ... 045-232-7119

I want to find an emergency medical institution

Consultation in case of sudden illness / Information on emergency medical institutions

Materials on heat stroke prevention

Heat Stroke Countermeasures Leaflet for Summer Events

Leaflet image for events

In recent years, the number of days when the temperature exceeds 30 ° C has increased, and the temperature has been rising throughout the year over the long term, so there is concern about the impact on health.
Based on the fact that heat stroke is particularly likely to occur at outdoor summer events, we have created a leaflet summarizing preventive measures for safe holding. Please use it together with the checklist.
Heat stroke measures leaflet for summer event holding (PDF: 3,179KB)

Prevention of heat stroke in the event of a disaster

Heat stroke is a serious illness that can lead to death, but it can be prevented with appropriate prevention and measures.
In the event of a disaster, unfamiliar environments and work increase the risk of heat stroke, so be careful while talking to each other.
Prevention of heat stroke at the time of disaster (PDF: 1,053KB)

A collection of links

[Yokohama Institute of Health]
・Let's prevent heat stroke (heatstroke, sunstroke)
・Heat stroke information

[City of Yokohama, Fire Bureau]
・Heat stroke-related information

Ministry of the Environment
・Heat stroke prevention information site (outside site)
・Results and Forecasts of Heat Index (WBGT) (outside site)
・Downloading of dissemination enlightenment materials (outside site)
・Heat stroke environmental health manual (revised in March 2018) (outside site)

[Ministry of Health, Labour and Welfare]
・"Let's drink water for health" promotion campaign (outside site)
・Occupational hygiene measures in the workplace [heat stroke prevention measures] (outside site)
・To prevent heat stroke (outside site)

[Fire and Disaster Management Agency of the Ministry of Internal Affairs and Communications]
・Heat stroke transport information, etc. (nationwide) (outside site)

[Meteorological Agency]
・To protect yourself from heat stroke [Temperature forecast information, weather forecast, etc.] (outside site)
・Abnormal weather early warning information (outside site)
・Kanto Koshin region 1 month forecast (outside site)

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