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2020/09/05 18:09 Weather news
In addition to storms and heavy rains, record tides can occur. “High tide” is a phenomenon in which the sea level rises when a typhoon or low pressure approaches and the pressure drops, and the sea level rises when seawater is blown towards the coast by strong winds. As the typhoon approaches high tide, the tide level rises even higher.
Even in the case of Typhoon No. 21 in 2018, there is a record that the tide level has risen by more than 2m in just one hour. It may be late to evacuate when the tide rises. Evacuate areas that may be flooded by high tides before a typhoon storm hinders movement.
[Efecto de succión]
A phenomenon in which the sea surface rises when a typhoon approaches and the pressure drops. In the open ocean, the sea level is said to rise about 1 cm when the pressure is 1 hPa lower.
[Efecto de soplado]
The wind carries the sea water to the coast and the sea level rises. Especially in the V-shaped bay, the sea level rises because the terrain that narrows towards the rear encourages sea level rise.
Also, the closer to the center of the typhoon, the greater the impact of high tide, so be sure to check the last expected heading. Also, the tide level can rise abnormally in a short period of time, not to mention high tide time, for several hours before and after high tide time. Check the time of high tide in advance along with the latest weather information.
If there is a possibility of your home being flooded due to high tide, prepare an emergency bag and evacuate as soon as possible in the event that an evacuation notice, evacuation order, or evacuation preparation information is issued. If you have family members or acquaintances who live in a safe place, consider evacuating there.
To protect yourself from high tides, it is essential to evacuate as soon as possible. However, if it is difficult to evacuate outside due to a storm, don’t overdo it and try to escape to the highest place possible and wait. If high tide is already approaching when you notice it, stay calm and try to do everything you can to save your life.
Cabinet, Fire Department, Ministry of Agriculture, Forestry and Fisheries, Fisheries Agency, Ministry of Lands, Infrastructure, Transport and Tourism, Meteorological Agency “High tide disaster and its response”, Ministry of Land, Infrastructure, Transport and Tourism Office Regional Development Department of Shikoku “What is the difference between tsunami and high tide?” http://www.skr.mlit.go.jp/bosai/bosai/tounannkai/kisochishiki/tunamikankei/douchigauno/douchigauno.html)
