A sudden flash flood in Pengzhou. Witness: It only took 5 seconds to be washed away by the flash flood. Will there be signs before the flash floods break out?

On August 13, 2022, a flash flood occurred in Longcaogou, Longmenshan Town, Pengzhou City, Sichuan Province, killing 7 people and seriously injuring 2 others. Witnesses said that after only five seconds, it was washed away by flash floods. Before the flash flood broke out, the local area had received the weather forecast and there was short-term heavy rainfall, so the Longmenshan town government also mobilized some organizations to persuade tourists in the river to leave, but some tourists suddenly broke out before they left the flash flood. So will there be many signs before the flash floods break out? In fact, when the water level of a stream rises rapidly or the water level of the western water drops sharply, the originally clear stream suddenly becomes turbid, mud suddenly appears on the ground, and then some abnormal mountain reputation or muffled thunder sounds in the mountains appear. It may be a sudden flash flood.

In fact, mountain torrents refer to the skyrocketing floods in some ravines, which are concentrated in expect the unexpected and have strong scouring and destructive power. Mountain torrents are mainly caused by short-term heavy rainfall and continuous rainfall. The flash flood accident in Hangzhou, the province, was also caused by sudden short-term rainfall in the back mountain. There will be some signs before flash floods happen. First, the water level of ravines and streams rises rapidly, indicating that a large amount of precipitation in the upper reaches has caused flash floods, or because of heavy rain, the mountain collapses, the water level of streams suddenly drops, and the river is cut off by the mainstream, so when the water flows through the blocked mountain, the flood will flow down.

There are also some signs that the originally very clear stream suddenly becomes very turbid, which indicates that it may be because of the heavy rain, which causes the sediment and stones in the mountains to enter the water, thus forming flash floods and even mudslides. Therefore, when the water is turbid or muddy water suddenly appears on the ground, you should be on your guard. In addition, some abnormal people's livelihood or some sounds similar to the rumble of trains, as well as muffled thunder, all indicate the possibility of flash floods and mudslides.

Of course, the best way is to avoid going to some accident-prone areas and avoid being in danger. Symptoms before getting angry are generally difficult to find, because it is difficult to notice these small details when playing, so it is still difficult to judge whether there are flash floods by signs before coming in the morning.