Continued vigilance even in the event of rain Danger of river flooding and landslides October 12 22:59
In Kanto and Shizuoka prefectures, there are areas where the rain has gradually weakened, but in fact, even after the rain has stopped, rivers may overflow and landslides may occur, so caution is necessary.
Rain falls on the river with time difference ...
First is the river.
According to the Ministry of Land, Infrastructure, Transport and Tourism, the rain that falls on the surrounding mountains flows into the river after a while, so the water suddenly increases after the rain stops or the water level remains high for a long time.
In addition, if the water level continues to be high, water will soak into the embankment soil, causing it to collapse, and in the worst case, it may break down.
Four years ago in the Kanto Tohoku heavy rains, very heavy rains continued in the Kinugawa basin and flooded in Joso City, Ibaraki Prefecture, causing massive inundation damage. It was later.
When we returned from the evacuation center, we had a landslide disaster ...
Sediment disasters can also occur after rain has stopped.
This is because it takes time for the rainwater soaked in the soil to escape.
In 1997, a large-scale debris flow that killed 21 people in the Harihara district of Izumi City, Kagoshima Prefecture, suddenly occurred after the rain stopped.
Some who died were evacuated, but some returned to their homes because of the rain.
People in areas with high risk of river flooding and landslides should continue to stay alert after the rain has weakened or stopped, and consider staying in an evacuation destination to protect themselves from the disaster.