The Danube is the longest river in the European Union and Europe's second longest river after the Volga.
The river originates in the Black Forest in Germany as the much smaller Brigach and Breg rivers which join at the eponymously named German town Donaueschingen, after which it is known as the Danube and flows eastwards for a distance of some 2850 km (1771 miles), passing through four Central and Eastern European capitals, before emptying into the Black Sea via the Danube Delta in Romania and Ukraine.
Map of European countries with gas supply cut. Red countries are entirely without gas supply, pink countries' gas supply is not cut entirely but lower than their consumption, grey countries are not affected or have not stated so.
