The manhole was the risk factor that caused casualties in this heavy rain, and I've seen many articles about when to be careful.
On the night of the 8th, a brother and sister fell into a manhole in Seocho-gu, Seoul.
The manhole cover was open due to heavy rain and it was sucked in in an instant.
At the time of the accident, it was raining more than 120 mm per hour.
In an experiment conducted by the National Institute of Disaster and Safety in the past by reproducing the road conditions at Gangnam Station in Seoul, even when it rained less than 50 mm per hour, the manhole cover weighing 40 kg jumped into the air in just 41 seconds.
Experts say that you should evacuate immediately when the sound of air escaping, which is a precursor to the opening of a manhole cover, or a shake of the cover.
It's never okay to watch sewage gushing out of a manhole like a fountain.
This is because the phenomenon occurs before the lid pops up.
In addition, he advised to avoid places that were flooded to the extent that it was impossible to see whether the manhole cover was opened, and to walk as close to the building as possible if unavoidable.