[zoey9797]

When I bought my tickets a few days ago, I asked as well.
They do not do a refund at all according to WDW Travel Co.
They would allow you to change dates in the case that they actually cancel the entire event. They only close the event if there is a hurricane, extreme weather or unforseen catastrophic event.
Certain portions may cancel or be moved due to weather- just like a normal rainy day in the parks.
I bought mine anyway because this is our first chance at going :) We usually go in January so I wanted to make sure we saw it.
If it rains, I guess we get wet. It will be better than 90+ degrees in the sun!
~zoey