I'm crossing my fingers things start to dry out by mid-November. You may want to start looking for back-up options. Siam Reap, Chiang Mai, Krabi maybe?
I'll be in Thailand starting Dec 3, and although we aren't spending heavy time in Bangkok, we do have two planned nights there. I'm less concerned about not seeing the tourist sites then just about being able to get to and from our hotels and flights. Definitely nervous at this point.