Are Typhoons Dangerous in the Inland?
TyphoonSays·防御问答 · Typhoon knowledge · 更新 at 2026-07-19
There is a misconception that many people think that the weakened wind force after the Typhoon Landfall means removing the danger.In fact, the danger of the Typhoon deep inland is often underestimated, and its rainfall and secondary disasters may even be more deadly than the storms in the coastal area.
Deep inland: Storm unstoppable, hidden danger of survival
According to the National Standard for Tropical Cyclones of the China Meteorological Administration, after the Typhoon Landfall is affected by ground friction, the largest wind force near the center will gradually weaken and the structure will become loose. but this does not mean it loses its destructive power.
For the inhabitants of the Inland, the main threat has shifted from “Winds” to “Rainstorm” and its induced secondary disasters:
- Flood disasters: Short-term heavy rainfall can lead to downturn in the city, flooding underground garages, subway stations and other low-water areas.
- Geological disastersIn mountainous or hilly areas, rainwater soils are easily induced by mountain slopes, mud streams and other disasters, such disasters are often sudden and hidden.
- The river flooded.The continuous rainfall in the upper river may flow into the river, which can cause the rise of the water level in the lower river, causing flooding in the basin.
Therefore, even in the inland, if the meteorological department has issued a Rainstorm red early warning or geological disaster weather risk early warning, it is necessary to remain highly alert.
What is “rest flow”?
When Typhoon's center wind force drops below Nameless, or its closed circle center is difficult to identify, it is usually no longer called "Typhoon" meteorologically, but its remaining clouds and air flow systems still exist, which is "residual circle."
You can imagine a residual circuit as a fan that is still rotating inherently while power is turned off, although it no longer has a rigid structure and a stunning wind speed like Typhoon, it is still a huge weather system:
- Transportation of water.It’s like a huge “water vapor transmission belt” that continuously carries the ocean’s moist air to the inland.
- triggering rain.If the residual circulation encounters the cold air of the N side, or is influenced by the rise of the terrain, it tends to trigger a wider range of influence than the typhoon console, and a longer duration of the heavy rainfall process.
- Moving slowlyResidual Circulation Moving is usually slower, and may stagnate less in a particular area, resulting in a “train effect” in the area, which means that rain clouds repeatedly pass through the same place, resulting in huge amounts of accumulated rainfall.
历史上, 许多造成严重Flood disasters的天气过程, 并非由完整的Typhoon 直接造成, 而是由Typhoon 减弱后的残余环流与周边天气系统total 同作用所致. 因此, 关注气象Forecast中关 at “Typhoon 残余云系”或“低压系统”的描述至关重要, 切勿因Typhoon 名称取消而放松防范.
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This article is typhoonsay's original copy content, and the local policy standards are based on the local government's latest release.