One is the strong wind. Typhoon wind speeds are mostly above 17 meters/second, or even above 60 meters/second. According to measurements, when the wind reaches level 12, the wind pressure per square meter on a plane perpendicular to the wind direction can reach 230 kilograms.
Thus, the strong winds of typhoons and the waves caused by them can throw a 10,000-ton ship into the air and break it in half, or push the ship inland; it can also damage or even destroy buildings, bridges, vehicles, etc. on land. Especially in areas where buildings are not reinforced, the damage is greater. Strong winds can also blow debris into the air, making the outdoor environment very dangerous.
The second is heavy rain. When a typhoon makes landfall, the rainfall center can drop 100-300 mm or even 500-800 mm of heavy rain in a day. Floods caused by typhoons are fierce and destructive, and are the most dangerous disasters.
The third is storm surge. When a typhoon moves toward land, due to the strong winds and low pressure of the typhoon, seawater accumulates strongly toward the coast, the tide level rises sharply, and the water waves press toward the coast like mountains. The storm surge of a strong typhoon can raise coastal water levels by 5 to 6 meters. If the storm surge meets the astronomical high tide level, it can produce high-frequency tide levels, causing the tide to overflow and seawalls to burst, destroying houses and various building facilities, flooding towns and farmland, and causing a large number of casualties and property losses.
In addition, these disasters caused by typhoons can easily induce secondary disasters such as urban flooding, house collapse, flash floods, and mudslides.