• Typhoons and heavy rains lead to river flooding, landslides, and tsunamis, causing property damage and human casualties. Therefore, preparation is needed.

​

• High winds: Typhoons produce strong winds. This wind can be divided into four stages: normal, strong, very strong, and super strong. The first stage, normal, is between 25 m and 33 m per second (between 61 km and 119 km per hour). This causes damage to the extent that the roof flies.

• The second stage, strong, is between 33m and 44m per second (less than 119km and 158km per hour). This is enough strength for the train to derail.

• The third stage, very strong, is more than 44 m to less than 54 m per second (less than 158 km to 194 km per hour). This is a very dangerous situation where people can fly away and large stones can fly.

• Finally, in the very strong stage, it is more than 54 m/s (more than 194 km/h). From this point on, the building collapses, causing more damage than we can imagine.