1, the typhoon is generated at sea, not because of the evaporation of water vapor, but because a large amount of water vapor from the tropical ocean can bring great energy to the formation of the typhoon. In the process of rising and condensation, water vapor will release huge heat, and a large amount of water vapor from tropical oceans can bring endless energy to the formation of typhoons.
2. The air near the land can be heated to form a cyclone, but it has little energy and no continuous water vapor. The surface heat is far from enough to provide enough energy for the formation of typhoons.
The attached picture shows the satellite image of super typhoon Yute (13 1 1) in the western Pacific before landing in the Philippines.