Our reservation was cancelled because of rain, but we didn't know until the very last minute. The Dine Line CM said that we might be notified ahead of time, if rain closed the restaurant for the whole day. But if the rain was hit or miss, we would have to go to the podium to find out whether the restaurant would be open. It really can be a last minute thing. It started raining about 10 minutes before our reservation time, and the restaurant decided to close for the night. I don't know what happened to the guests who were already seated and getting wetter by the minute. I agree that there will be many disappointed guests if reservations end up being cancelled due to weather.