The wrecks of explosives-laden Nazi ships sunk in the River Danube during World War Two have emerged near Serbia's river port town of Prahovo, after a drought in July and August that saw the river's water level drop.

Four vessels dating from before 1950 have also come to light in Hungary's Danube-Drava National Park near Mohacs, where the Danube's water level stood at only 1.5 metres on Tuesday (September 10) the lingering effect of severe heat waves and persistent drought in July and August.

SUNKEN GERMAN WORLD WAR II SHIPS REVEALED WITH DANUBE RIVER AT RECORD LOW

The vessels revealed in Prahovo were among hundreds scuttled along the Danube by Nazi Germany's Black Sea fleet in 1944 as they retreated from advancing Soviet forces, destroying the ships themselves. The wrecks can hamper river traffic during low water levels.

A fisherman inspects a sunken German warship from World War II, recently recovered from the Danube River after being exposed due to low water levels caused by drought and extreme heat, in Prahovo, Serbia, September 5, 2024.  (REUTERS/Djordje Kojadinovic)

Strewn across the riverbed, some of the ships still have turrets, command bridges, broken masts and twisted hulls, while others lie mostly submerged under sand banks.

Endre Sztellik, a guard at the Danube-Drava national park said of one of the ships in Hungary "we still don't know what this is exactly. What is visible and is an unfortunate fact is that the wreck is diminishing as people are interested in it and parts of it are going missing."

The Danube stood at 1.17 metres (3.8 feet) in Budapest on Tuesday, which compares with an all-time record low of around 0.4 metres registered in October 2018. During floods the Danube rises well above 6 metres.

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"Eastern Europe is experiencing critical drought conditions that are affecting crops and vegetation," the European climate service Copernicus said on its website in its latest drought report published earlier this month.

Long-awaited rainfall set in on Monday (September 9) which is expected to raise Danube levels to around three metres at Mohacs by the weekend, with the river likely to submerge the shipwrecks again.