I don't know, you have to ask the hotel about this special case, just know that Airlines will not give you any compensation in case of weather problem leading to cancel or divert flights.
It seems that remings will pass just south of Manila, see here: http://newsinfo.inq7.net/breakingnew...ticle_id=35575
The Manila airport authority was also considering diverting all incoming flights to Hong Kong, radio reports said.
May be better to consider an hotel in Hong-Kong???
But you will know only at the last minute if the airport is open or closed.