The entire course of the Danube in Austria has been closed to shipping due to flooding caused by heavy rainfall in the country, and in neighbouring southern Germany. The state waterway company, via donau, announced the closure on Tuesday. “Safety cannot be guaranteed above a certain water level,” Christoph Caspar, spokesman for via donau, told dpa. How long the measure will remain in force depends on further rainfall and the water levels in the Danube’s tributaries. The Danube flows over 350 kilometres through Austria, from the Bavarian border city of Passau to the Slovakian capital Bratislava…