Typhoon # 15
Typhoon No. 15 approaches Kanto, etc. while maintaining a strong power, and fierce winds are expected, and the maximum instantaneous wind speed may reach 60 meters.
Furious winds of over 200 km / h
The maximum instantaneous wind speed of 60 meters is equivalent to 216 km / h.
▽ Outdoor activities are extremely dangerous.
▽ In addition to the risk of collapse of old buildings,
▽ A telephone pole or a block fence collapses,
▽ A running truck may roll over.
In Typhoon No. 21 last year
Typhoon No. 21 last September was actually stormy. At Kansai Airport in Osaka, we observed the strongest wind speed of 58.1 meters, which was the strongest in the history of observation, and buildings and other damage caused by storms continued in the Kansai area.
▽ In Shiga Prefecture, the company's warehouse collapsed and a man died,
▽ In Osaka and other places, 14 people were killed by hitting flying roofs and objects or falling from the veranda.
Last year, there was a storm in Kanto
Last year's Typhoon No. 24 observed the strongest instantaneous wind speed of 45.6 meters in Hachioji City, Tokyo, which was the strongest in the history of observation. .
Prepare for the typhoon
Before the typhoon approaches, make preparations such as clearing things that are easy to fly outside, or evacuate to a safe place. Do not go out of the house or work outdoors after the wind has strengthened.
This typhoon No. 15 is expected to rain heavily in urban areas such as the Tokyo metropolitan area, but because there are many paved roads and rainwater is difficult to permeate, drainage cannot catch up and there is a risk of flooding. The situation may worsen suddenly, and in particular, low land such as “Underpass”, subway stations, underground malls, etc. have high risk of inundation, so caution is required.
Inundation at 50 mm or more per hour
According to experts, in large cities such as Tokyo, there are many places where sewage systems are installed so that they can be drained even in the case of heavy rainfall of about 50 mm per hour.
However, if it rains more than that, drainage will not be able to catch up, and low land and underground malls may be flooded.
Pay attention to lowland and underpass
Of these, water tends to gather on low land and narrow roads, and it can flow as fast as a river, and there is a danger that it will be swept away.
In particular, in the “underpass” that passes under railroads and roads, there are frequent accidents in which a sudden heavy rain floods, a car enters without being noticed, and the rider dies.
When the car gets in the water, the depth of water immersion is ▽ 10cm to 30cm, and the brake performance decreases,
▽ The engine stops at 30cm to 50cm,
▽ It is said that there is a danger that the car will float and be trapped and swept over 50 cm.
When the outlook is bad, such as at night or when the wind and rain get stronger, you should stop your car in a safe place without forcibly driving, and wait for the rain clouds to pass.
Beware of manhole fall
When the drainage cannot catch up,
▽ In addition to the pressure of rainwater flowing into the sewer pipe, the lid of the manhole may shift or come off,
▽ Water flowing through the ditch increases momentum.
In the past, there were cases where people fell down and died without realizing that the manhole cover had been removed on a flooded road.
“Vertical evacuation” in the case of flooding
If the surrounding area is flooded, “vertical evacuation” is effective, in which you do not move unnecessarily and evacuate to the second floor or higher of a nearby sturdy building.
However, if there is no safe building nearby and you have to walk around the flooded area, you can move with two or more people, or carefully check your feet with umbrellas or sticks. is needed.
Evacuate early from the basement
In the basement, because the ground conditions are unknown, it is difficult to notice that the rain is getting stronger or the inundation has started, and evacuation may be delayed.
When inundation begins, the water that flows into the basement gains momentum, and it becomes difficult to climb the stairs against the flow and get out of the ground. It becomes difficult to open.
In 1999,
▽ The area around JR Hakata Station in Fukuoka City was flooded, and a large amount of water flowed from the stairs to the underground mall and subway.
▽ In Tokyo and Shinjuku Ward, the basement of the house was flooded and one person died.
When you are in a subway station, underground mall, or in a residential basement, it is important to be aware of the latest weather information and evacuate early.
Be wary of small rivers in the city
Rivers flowing through urban areas are narrow and the bottom of the river is often covered with concrete, so the water level can rise rapidly and flood in a short time.
After confirming that the water level has risen, evacuation may not be in time. In addition to avoiding access to the river after the rain gets stronger, should you evacuate to a safe place in advance, such as at a house near the river? Please ensure safety, such as moving to the second floor or higher of your home.