It's worth noting we're just talking about if the race had been this weekend. There's no issue next weekend with any risks of typhoons etc.
it CAN indeed happen tho. Within last decade, quali had been postponed twice at Suzuka, one due to typhon, one due to intense rain (not typhoon). Summer-fall is typhoon season in eastern pacific rim of northern hemisphere, so if F1 keeps Suzuka (and Yeongam as well), someday it WILL happen.
Oh there is one small tropical low pressure system lurking around at mariana islands right now, that one may develop into typhoon and hit Japan next weekend, you never know.
Thankfully forecast is looking ok-ish for next weekend atm, tho.
But given the amount of rain, the flooding, the potential damage etc, and with it being a double header, they wouldn't have moved it to the Monday if it was this weekend. This is all merely hypothetical, because we're not there this weekend, it's just a case of "what would have happened if we had been there this weekend"
oh yeah , forgot about double header with yeongam, there's logistic issue.. So Monday race is impossible then. Looking back how the typhoon prediction unfolded this time, I think most likely it wouldve been Saturday late afternoon race, proably announced within friday already.
I dont know how they compensate it for audience, but they arent dumb, thye must have plan already. I dont know about terms and condition for Suzuka tickets, but maybe ticket buyers are unknowingly forced (haha) to accept greater inconvenience in such cases.. having said that, such thing as re-scheduling main event of big once-a-year attraction like F1 is nothing but nightmare no matter what. they would do some big compensation and lose huge, I think..