Examples of damage caused by localized heavy rainfall <Materials being presented>
We will introduce examples of accidents that have occurred in the workplace, such as the incident where five workers were swept away.
In recent years, natural disasters have frequently occurred in Japan, with some region being affected by disasters every year, resulting in significant damage. On August 19, 2009, a flash flood occurred in a drainage channel flowing through Higawa in Naha City, Okinawa Prefecture, sweeping away five workers who were working near the entrance to the underground section of the channel. The related catalog provides detailed explanations of the damage that occurred at the actual work site, including an overview and the weather conditions at the time. Understanding what events have happened in the past may help raise awareness in nearby work sites. Please feel free to download and take a look. 【Damage Case】 <CASE 1: Flash flood in a drainage channel in Naha City, Okinawa Prefecture, sweeping away five workers, four of whom died> ■ On August 19, 2009, at 2 PM, a flash flood occurred in a drainage channel flowing through Higawa in Naha City, Okinawa Prefecture. ■ It is believed that the water depth before the increase was approximately 30 to 50 centimeters. ■ According to the Okinawa Meteorological Observatory, the atmospheric conditions above the site were unstable at the time of the incident, with a thunderstorm warning issued in the morning and a heavy rain and flood warning issued in the afternoon. *For more details, please refer to the PDF document or feel free to contact us.
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【Other Damage Cases】 <CASE 2: Heavy Rain Mainly in the Kanto-Koshin Region - In Zoshigaya, Toshima Ward, Tokyo, a worker was swept away during sewer construction, resulting in 5 deaths> ■ On August 5, 2008, during sewer construction in Zoshigaya, Toshima Ward, Tokyo, 6 workers were swept away while working underground. ■ A front was stagnating over the Kanto-Koshin region, with moist air flowing in from the south, causing the atmospheric conditions to become very unstable. ■ A thunderstorm warning had been in effect for the 23 wards of Tokyo since the previous day, and on the day of the incident, a heavy rain and flood advisory was issued at 11:35 AM, followed by a heavy rain and flood warning at 12:33 PM. *For more details, please refer to the PDF document or feel free to contact us.
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