暑さ本格化 7都県に「熱中症警戒アラート」、今からでも間に合う「暑熱順化」対策【Nスタ解説】｜TBS NEWS DIG

Today (July 9th), temperatures rose nationwide, and a "heatstroke warning alert" was issued in seven prefectures, the highest number this year. We covered heatstroke prevention measures. ■ Highest number of "midsummer days" this year: Japan covered by Pacific high pressure Takahiro Inoue, newscaster: July 9th was a hot day. Could the typhoon be contributing to this heat? [Highest temperatures on July 9th] 1st place: 35.5℃ - Hita, Oita; Kurume, Fukuoka 3rd place: 35.3℃ - Kyoto *As of 4 PM on July 9th Manami Sakaguchi, weather forecaster: Following the influence of the typhoon, the Pacific high pressure system has strengthened, and the entire Japanese archipelago is now covered by it. On the 9th, there were a considerable number of locations with temperatures above 30℃, recording "midsummer days" at 544 locations. This is the highest number in 2026. The previous record for the highest number of locations recorded in 2026 was 392, so temperatures have risen sharply. ■Heat as a "Disaster": Shelters Needed for Heatstroke Prevention Anchor Takahiro Inoue: In the future, the number of locations experiencing "extreme heat days" with maximum temperatures exceeding 35℃ will increase. The heat poses a life-threatening risk. 【Number of People Transported by Emergency Services Due to Heatstroke】 2024: 97,578 people 2025: 100,510 people *Announced by the Ministry of Internal Affairs and Communications (Nationwide) May-September According to the number of people transported by emergency services nationwide, as announced by the Ministry of Internal Affairs and Communications, approximately 100,000 people were transported by emergency services during the five-month period in both 2024 and 2025. [Heatstroke Deaths] 2024: 2098 people 2025: 1521 people *Announced by the Ministry of Health, Labour and Welfare (nationwide), May-September The number of people who died from heatstroke exceeded 2000 in 2024 and 1500 in 2025. This translates to 300-400 deaths per month. There's a term called "heat acclimatization," which, according to the Ministry of Health, Labour and Welfare, means the body becoming accustomed to the heat. According to Dr. Tsuyoshi Fujinaga, Vice Director of Saitama Jikei Hospital, if the body doesn't adapt to the heat, its thermoregulation can't keep up, increasing the risk of heatstroke. While heavy rain and earthquakes are easily associated with the perception of "disasters," heatstroke is also clearly a "disaster," so the government and local authorities must focus on heatstroke prevention. TBS Special Commentator, Hiroshi Hoshi: It's clearly a "disaster," isn't it? Just as evacuation is necessary during disasters, shelters are also being built to protect against heatstroke. The Ministry of the Environment's website makes it easy to find the locations of these shelters, so you can evacuate there if necessary. Mai Izumi (Anchor): These days, prices for various things are high, but I hope people will turn on their air conditioners without hesitation. ■Continued cool days reduce the effect of "heat acclimatization" - what happens when temperatures suddenly rise… Inoue (Anchor): A characteristic of this year is that it got hot very quickly. We compared the number of days with a maximum temperature of 30℃ or higher in Tokyo from May to July 9th. [Tokyo: Days with a maximum temperature of 30℃ or higher] 2024: 15 times 2025: 23 times 2026: 6 times *Comparison based on the period from May to July 9th It's clear at a glance. While announcements have been made to "be careful of the chilly weather during the rainy season," it seems that it was cooler than usual. Meteorologist Aimi Sakaguchi: In 2026, the region was particularly susceptible to the influence of the Okhotsk Sea High, and the Kanto region in particular was prone to the effects of cold, humid air. As a result, there were many cloudy and rainy days, and June, in particular, saw temperatures lower than average. This was the first time this had happened in seven years, since 2019. Anchor Inoue: Just when we thought the rainy season would continue a little longer, it suddenly seems to be ending. This means our bodies may not be able to adapt to the sudden temperature changes. We spoke with Dr. Tsuyoshi Fujinaga, Vice Director of Saitama Jikei Hospital. Dr. Fujinaga said that "the body, having become accustomed to the heat, may revert to its original state." If cool days continue, the effect of heat acclimatization decreases within 3 days to a week. It returns to its original state in 2 weeks. If the temperature rises sharply after returning to the original state, the body is more susceptible to shock, and the risk of heatstroke increases dramatically. When the temperature rises suddenly, the body, which is accustomed to temperatures around 25℃, may not be able to keep up, and symptoms such as fatigue and dizziness may appear. ■38℃ forecast for Saga: Take extreme caution against heatstroke Inoue (caster): Looking at the weekly f...