Have generally found when operating in the western pacific (Japan-SIN/CMB for example) that most can be overflown at FL330 or above, but the route of flight should be altered to accomodate engine inop/systems diversions if required.
Have landed at airports in HKG, Japan, Taiwan when approaching tropical storms necessitated much maneuvering to avoid buildups etc but usually flying is suspended when the typhoon approaches.
Interesting NDB approach to the old HKG airport from over CC when the IGS tripped off due to very heavy rain...required maximum attention.