It's already hot!

Am I suffering from heat stroke?

Risks other than temperature are 18:29 on June 1st.

From Hokkaido to Okinawa, many people are being transported nationwide due to heat stroke.

Over 2,500 people in just over a month until the end of May.



"I suddenly felt dizzy and my vision started spinning. I calmed down in about 30 seconds, but even after I got home, I felt sick ..."



A teenage college student who was confident in his physical strength It was when I was enjoying bowling in Tokyo.

Looking back, in addition to the "heat" of the day, I had the feeling that "I had no choice but to suffer from heat stroke."


(* We will also introduce detailed articles on heat stroke symptoms and countermeasures)

The last weekend of May when it was hot

This weekend, May 29th, Tokyo was the first midsummer day at 31.2 ℃.

Sano in Tochigi Prefecture and Kamisatomi in Gunma Prefecture had a hot day of over 35 degrees Celsius.



The university student at the beginning also said that it was "the hottest day" about this day, but when I asked why I thought that I had symptoms like heat stroke, the first thing I mentioned was factors other than temperature. did.

[Knowledge # 1] Lack of food

First, I didn't eat enough.



He says he ate little breakfast that day and just picked up french fries during the day.

It also means that the amount of hydration was less than usual.

[Knowledge # 2] Fatigue of new life

The second is the tiredness of the new life that began this spring.

From the days of studying for university entrance exams, I attended university classes in April and started working part-time.

He said he was feeling tired as the rhythm of his life and the environment changed drastically.

(College student)


"I tend to sweat a lot when it's hot, but yesterday I stopped sweating. I ate salt musubi, took a lot of water and went to bed early, and this morning I felt better, but I'm healthy. I was so confident that I didn't expect this to happen. "

I usually manage my physical condition

It is said that this college student has continued to play intense sports, but he has never had symptoms like heat stroke.



Experts who are familiar with heat stroke measures say that it is important not only to take measures against the heat itself, but also to manage the following physical conditions.

▼ Hydration is done not only at meal time but also at a fixed time


▼ Replenish nutrition such as protein and manage physical condition


▼ Sleep soundly and recover physical strength

Especially for children and the elderly, delays in countermeasures can be fatal, so caution is required.

Extreme heat is a "disaster" Measures against "heat stroke" that saves lives

Click here for details on prevention of heat stroke

What you need to know to protect children with heat stroke

Click here for reasons and countermeasures for children who are prone to heat stroke

Even though the air conditioner was working

Another man in his twenties, who was the first to experience heat stroke-like symptoms this weekend, told me.

On May 28, the highest temperature in Kochi City, where a male company is located, was 28.6 ° C.

(Office worker)


"I was lying down after reclining the driver's seat of the car that was parked in the parking lot at work during my break from work ..."

A man said that the air conditioner in the car was set to 22 ° C because it was hot, and the air conditioner was sufficiently cooled.

He said that there would be no problem for a short time, but when he turned off the air conditioner with the door closed and started taking a rest, the inside of the car became hot rapidly.

It was so hot that I couldn't stand it right away, and when I got up in about 5 minutes, I had a slight headache and nausea.

Immediately I returned to the air-conditioned workplace to drink water, but the symptoms lasted for over an hour.

(Office worker)


"It's still May, so I thought it would be okay for about 10 minutes without air conditioning. I think it was a relatively mild symptom, but it still felt tight."

Dangerous heat stroke in the car even in early summer

On May 25, there was a tragic accident in which a one-year-old boy was left in a car for about three hours in a parking lot in Niigata City and died.

Police are investigating suspected heat stroke.

On that day, the highest temperature in Chuo-ku, Niigata City was 27.5 ℃.



The following results were obtained in an experiment conducted by JAF = Japan Automobile Federation regarding the rapid rise in vehicle temperature from this period to summer.

▼ In early May, the temperature is 23 to 24 ℃


 ⇒ The temperature inside the car reaches around 40 ℃ in 1 hour


▼ In late August, the temperature is 35 ℃


 ⇒ Turn off the air conditioner and reach the "danger" level of the heat stroke index in 15 minutes

Every year, troubles occur in various places where the key is left behind in the car and the car is locked from the inside.

JAF cautions that "summer, especially if a child is trapped, it can be life-threatening."

The car door suddenly locks!

What if a child is trapped in a car in the summer?

Don't hesitate to dial 119

Summer production is a little further away, but there are already a lot of people being transported by emergency due to heat stroke on a daily basis.

According to the Fire and Disaster Management Agency of the Ministry of Internal Affairs and Communications, 2,572 people were transported nationwide within a month or so until May 29, which is already over 2000 people.

▼ The largest number is 162 in Osaka,


▼ Next is 149 in Tokyo,


▼ 148 in Aichi, etc. In addition, the


number of people being transported by emergency is increasing in Hokkaido and the Tohoku region.



Of these, 3 died and 41 were "severe" requiring hospitalization for at least 3 weeks.

(Nearly 70% of the transported people are mildly ill)

A person in charge of the Fire and Disaster Management Agency of the Ministry of Internal Affairs and Communications pointed out that heat stroke may occur even if it is not in the summer when it gets hot in earnest, depending on the work environment and other conditions, and it is necessary to be careful from this time.

(Person in charge of the Fire and Disaster Management Agency, Ministry of Internal Affairs and Communications)


"The number of emergency transports for heat stroke will increase rapidly after the rainy season, when it gets really hot, so I want you to gradually get used to the heat as soon as possible to prevent heat stroke. If you feel something is wrong with your physical condition or if someone with you responds strangely to the call, don't hesitate to call 119. "

Although I was refraining from going out in Corona, I think that there are many people who have suddenly increased their opportunities to go out recently.

It is said that it is also possible to prevent heat stroke by trying "heat acclimatization" to acclimatize the body to the heat without overdoing it.

It's going to get hot this summer too ... Measures against heat stroke Important things at this time

What is "heat acclimatization"?

How do you do it?

Click here if you are interested.

It's not just the temperature ... What is the "heat index"?

When you want to know the risk of heat stroke, the first thing to check is the "maximum temperature" of the day.

However, in fact, as a measure against heat stroke, it is effective to use the "heat index" as a guide rather than the temperature.



The heat index is an index devised in the United States that indicates the risk of heat stroke, and considers three factors: humidity and "radiant heat" in addition to temperature.

The most important of these is "humidity."



It is said that the risk of heat stroke increases because sweat does not evaporate easily in places with high humidity and it becomes difficult for the body's heat to escape to the outside.



For example, in terms of the number of people actually transported due to heat stroke, even if the temperature is the same at 32.5 ° C,


▼ 50 people on a day with a minimum humidity of 41%,


▼ 94 people on a day with a minimum humidity of 56%. There is also data that it has increased nearby.



This "heat index" is divided into 5 stages such as "danger" and "strict caution", and you can check the forecast until the next day on the NHK site, so please check it out.

Preventing heat stroke

Check the "heat index" of your area on this site

In particular, when the heat index is predicted to exceed the highest level of "danger" criteria and reach 33 or higher, a "heat stroke warning alert" will be announced.



This was already announced on May 29th and 30th in the Yaeyama region of Okinawa prefecture.

This information is often announced nationwide during the summer production from July to August.



Please be prepared for heat stroke by referring to the "heat stroke warning alert" and the site's predictions.