Earlier it said performances were not expected to be affected by floods, but that it was contacting audiences to warn them to leaveextratime to find parking.
Where conditions prove to be poor and a journey is unavoidable, drivers are asked to leaveextratime or to consider delaying their journey if the weather becomes severe.
Zamora gave Fulham the perfect start in the Volkswagen Arena on Thursday, scoring after 21 seconds to cancel out Wolfsburg's late away goal in the first leg and leave the Germans needing two goals to force the game to extra-time.