If fireworks are still displayed, it will probably not cancel your reservation but lightning or excessive wind definitely will.
The fireworks usually have to be discharged nightly …they can not be saved for next night . Sometime during the night you might hear those cancelled fireworks.
Are you watching radar on your cellphone?
Currently area has Special Weather Statemnt
Color is yellow, red is in the way
30% at 7:00 tonight / end of storm but overcast.
What was your cancel policy ?