2009 The 2009 Donauinselfest was on the verge of being canceled due to flooding . It had rained consistently for the last few days , making it necessary to open flood protection , which leveled out the water level on the sides of the Donauinsel , but being enough to flood the side paths , that would have provided an important escape route should it be necessary . Luckily , the water level sank and the roads were cleared in time , saving the event
flooding
2009 European floods
Donauinselfest