Mito Nakagawa Overflow confirmation is 8 hours after the meteorological station contact or October 31 16:44
Regarding the Nakagawa River in Mito City, which was flooded by Typhoon No. 19, it was found that it took about 8 hours to confirm after the Kanto Regional Development Bureau received a report from the local weather station that there was a risk of flooding. . In the Nakagawa River, “inundation occurrence information” was not announced, and in the flooded area, there were a series of residents' rescue requests during this period, and the Kanto Regional Development Bureau will investigate the process that took time to confirm.
In the early morning of 13th of this month, heavy rain caused by Typhoon No. 19 flooded the Nakagawa River and its tributaries, resulting in flood damage.
The Mito Local Meteorological Observatory contacted the Hitachi River National Highway Office of the Kanto Regional Development Bureau, which manages the river, at around 4:00 am on the 13th, saying that the Naka River might have been flooded.
However, the interview with the Kanto Regional Development Bureau revealed that it was around noon, about 8 hours later, when it was confirmed that the office that was contacted was actually flooded.
When flooding is confirmed, the country is to announce "inundation occurrence information" that demands maximum alert from residents, but this information is not issued this time, and in the inundated area of Mito city in the meantime Rescue activities were carried out by boats and helicopters after a series of rescue requests from residents.
In the heavy rain of Typhoon No.19, the Nakagawa embankment broke down at other locations in the prefecture, but no information on the occurrence of inundation was announced, and the Kanto Regional Development Bureau said, to examine the challenges we want, "published in the prospect of the end of the year for the transmission and dissemination of information.