Heavy rainfall during the flood season makes flash floods prone. What are the symptoms of flash floods?
Flash floods are sudden floods that occur in streams and gullies in mountainous areas. They are characterized by suddenness, concentrated water volume, high flow speed, and strong erosion and destructive power. The water flow of flash floods carries sediment and even stones. It and the debris flows and landslides it induces often cause casualties, destroy houses, fields, roads and bridges, etc., and may even cause dams and ponds to burst, causing Very serious hazard. Mountainous areas are areas prone to flash floods.
If you are out playing during the heavy rainfall in the flood season, you will find that the water in the ravine has become turbid and the water level and flow rate have increased significantly. You can also hear loud noises from upstream. This may be the loud noise caused by the high-speed discharge of floods, indicating that The peak of the flash flood will hit in a short time.
Before heavy rains and floods occur, (1) avoid activities in low-lying areas and areas threatened by landslides. Inspect the front and back of the house at the beginning of every summer and pay attention to nearby geological changes to see if there are any signs of danger. (2) Be familiar with the surrounding environment and prepare necessary waterproofing and drainage facilities, such as canvas, woven bags, sand, wooden boards, water pumps, etc. Pay attention to the forecast from the local meteorological and flood control department. In particular, in densely populated areas, work such as personnel evacuation and transfer must be carried out in a timely manner.
After heavy rains and floods occur, (1) when major signs are discovered or a disaster has occurred, spread the news as soon as possible to attract attention and strive to control the development of the disaster and provide rescue. (2) In an emergency, keep a cool head, act quickly, and give up decisively. Heavy rains and floods are sudden, with steep rise and fall, and short duration. When you find that the river is swollen, you must evacuate quickly and do not hesitate. When the river floods during the flood season, do not force the river to cross. You must wait patiently for the water to recede before crossing the river, or cross the river in a long detour. (3) When heavy rains and floods occur, pedestrians should take shelter away from dangerous areas such as high-voltage lines and electrical equipment, and turn off their mobile phones during thunderstorms. (4) Provide emergency rescue such as artificial respiration to the drowning person in a timely manner.
When mountains show signs of flash floods, there is often not much time left for people to escape. Nowadays, with advanced technology, relevant departments will definitely issue warnings when the weather changes drastically. I hope everyone will follow the Meteorological Bureau’s prompts. Avoid danger in time!