The Danube River, the second longest in Europe, is running so low that dozens of Nazi battleships are emerging from the riverbed. Advertisement AdvertisementAdvertisement AdvertisementThe Danube's record low water levels also have forced power plants to the brink of shutting down, and governments across Central and Eastern Europe are taking steps to conserve electricity. Advertisement AdvertisementAdvertisement AdvertisementHistorians say up to 200 German warships were scuttled in September 1944 near Prahovo in the Danube gorge as they came under Soviet fire. The Danube in Hungary is running dryRomania shut down both reactors at its Cernavoda nuclear power plant due to low water levels in the Danube River used to cool them. Meanwhile, near-record low water levels on the Danube have also left several cruise ships stranded north of Budapest and forced the suspension of sightseeing trips.