Let's be careful about heat stroke

Operation of the heat stroke Special Warning Alert, etc.

　The Ministry of the Environment will launch the heat stroke Special Warning Alert on April 23, 2025.
　The heat stroke Special Warning Alert is issued by the Minister of the Environment when the temperature is extremely high and could cause serious health damage to the heat stroke.
　There is a risk of serious health damage in areas where the heat stroke Special Warning Alert is issued. 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 Alert, jointly announced by the Ministry of the Environment and the Japan Meteorological Agency, will be launched on April 23, 2025.

<Operation period of heat stroke Special Warning Alert and heat stroke Alert Alert>
　April 23, Reiwa 7-October 22, Reiwa 7

・heat stroke Prevention Information Site, Ministry of the Environment (heat stroke Alert, heat stroke Special Alert, etc.) (external site)
[Reference] About information dispatch in heat stroke prevention information site of Ministry of the Environment (PDF: 1,256KB)
・About heat stroke warning alert, heat stroke special warning alert (PDF: 114KB) (Ministry of the Environment)
・heat stroke Special Warning Alert Poster (PDF: 626KB)

Yokohama City distributes information on heat stroke Alerts via disaster prevention information e-mail when the Kanagawa Prefecture heat index is predicted to be 33 or more.

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 cool share spots near you as a countermeasure 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.

4. Promotion of health on a daily basis

・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.
The number of heat stroke created by the Ministry of the Environment is increasing. Points for prevention (Flyer A4 both sides) (PDF: 1,425KB)
Created by Otsuka Pharmaceutical Co., Ltd. Let's take measures against heat stroke with 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 becomes severely ill, there is no sweat and dry skin, 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 heat stroke measures for the elderly (both A4 flyers) (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. Beware of heat stroke (for children, parents and leaders) (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 Prevention of heat stroke

heat stroke 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 leaflet for holding summer events (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 will increase the risk of heat stroke, so be careful while talking to each other.
heat stroke Prevention in Disasters (PDF: 1,053KB)

Links

[City of Yokohama, Medical Care Bureau]
・Yokohama Medical Dashboard (heat stroke Dashboard) (external site)
[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 March 2018) (external 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]
・[Temperature forecast information, weather forecast, etc.] (external site) to protect yourself from heat stroke
・Abnormal weather early warning information (outside site)
・Kanto Koshin region 1 month forecast (outside site)

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