Kumamoto Record heavy rain 18 dead in "submerged" house along the Kuma River October 4, 19:49

NHK's analysis revealed that houses were submerged and 18 people were killed along the Kuma River in Kumamoto Prefecture, which was severely damaged by the heavy rain in July.

NHK's analysis also revealed that there are about 4000 houses at risk of being submerged around the Kuma River, experts said, "Early evacuation to a high place away is important in places where deep inundation is expected. It is. "

NHK investigated the location and situation of the disaster in detail for 84 people nationwide who died in the heavy rain in July.



It was found that 67 people, or 80% of the total, died due to "flood damage" caused by flooding of the river, and 18 of them died due to the submergence of houses along the Kuma River in Kumamoto Prefecture. ..



Looking at how many floors the house was, ▽ "One-story building" died in Hitoyoshi City, Kumamoto Prefecture, 7 people each, Kuma Village and Yatsushiro City, 3 people each, Ashikita Town, 2 people, Fukuoka Prefecture There were a total of 16 people in Omuta City, and two people in Kuma Village died on the "two-story second floor".



According to the Ministry of Land, Infrastructure, Transport and Tourism, if the inundation depth exceeds 5 meters, the two-story building will also be submerged, and it is thought that the inundation depth was comparable to this even at the place where the dead occurred this time. Can be done.



How many houses are at risk of being submerged along the Kuma River?



NHK independently analyzes the inundation around the Kuma River and the "building data" of more than 90,000 buildings of the map company Zenrin, and "one-story building" within the range where inundation of 5 meters or more is expected. I checked the number of "two-story" houses.



As a result, there is a total of 4002 buildings in 10 municipalities along the river, and by municipality, ▽ Hitoyoshi City has the largest number of 2461 buildings ▽ Yatsushiro City 631 buildings, ▽ Kuma Village 561 buildings. And so on.



There are many houses in various parts of the country, including the Arakawa and Tama rivers that flow through the Tokyo metropolitan area, that are at risk of being submerged at a depth of 5 meters or more.



Professor Motoyuki Ushiyama of Shizuoka University, who is familiar with evacuation behavior, said, "If the inundation exceeds 5 meters," vertical evacuation "will not help, so" eviction evacuation "is the principle.



It is important to check the hazard map to see how much inundation is expected and to think about what kind of action is necessary on a daily basis. "



On the other hand, it is said that there are many places in small and medium-sized rivers where hazard maps are not maintained. .



secure the river does not flood is considered not to exist, in a place close to the river have been like to see action in mind the flood. "