Earthquakes and typhoons
Taiwan records thousands of earthquakes a year and occasionally a damaging one — the April 2024 Hualien quake reached magnitude 7.4, killed people and triggered landslides that closed the Taroko Gorge road network. Check whether specific national park routes have reopened before planning around them.
Typhoon season runs roughly July to October. A direct hit shuts down transport, closes offices and schools by official announcement, and makes mountain areas dangerous for days afterwards because of landslides. Build slack into an itinerary in those months.
Scooters and mountain roads
Scooters dominate Taiwanese traffic and renting one requires a licence the rental shop may not check but the police will. An International Driving Permit with the motorcycle category is needed; riding without it voids insurance entirely.
The cross-island highways are spectacular and narrow, with rockfall, fog and heavy truck traffic. Landslides close them without notice, particularly after rain.