Drought Drains Czechia's Orlík Reservoir and Uncovers a Lost Village

Prolonged drought has exposed house foundations, abandoned roads and the remains of a river crossing at the Orlík reservoir in Czechia, Expats.cz reports. The features had spent decades mostly underwater.

Visitors can now explore the remains of Podolsko, a settlement lost when the Vltava valley became part of a major water project, beneath the concrete arch of Podolský Bridge. The foundations mark where families lived beside the river. In September, Czech Radio revisited former resident Pavel Smrt, who identified his childhood home's kitchen, cellars and garage entrance, and recalled residents dismantling their homes as the water rose. The settlement's historic chain bridge was taken down before the flooding and rebuilt over the Lužnice River, where it survives as the Stádlec Bridge. Remnants of its original crossing are now visible at Orlík.

In early September, Czech media reported that Orlík had hit a historic low, about 15 metres below its usual level. The drop revealed remnants of several former communities, as well as weirs, industrial structures and wartime fortifications. Other exposed sites include a settlement below Zvíkov Castle, the foundations of a former hotel near Červená nad Vltavou, and the remains of a hydroelectric plant that once supplied the Protivín brewery. An earlier iDNES.cz account estimated that about 1,600 people had to move and that 500 to 600 buildings stood in the flooded area. Many homes were demolished before the valley filled, which is why visitors find foundations rather than intact streets.

Behind the curiosity sits a water-management problem. Orlík helps sustain downstream Vltava flows in dry periods by releasing stored water when natural inflows fall short. By early September, falling levels had led to the use of reserves from the Slapy reservoir to support those flows. On 7 October, Central Bohemian authorities declared a water-shortage situation affecting the Vltava and Elbe in the relevant part of the region.

They also approved measures allowing the minimum release at Vrané to drop from 35 to as low as 20 cubic metres per second, if needed. The Agriculture Ministry said the goal was to slow further declines at Slapy and possibly Orlík until rainfall improves. Existing permitted water uses were not restricted at the time of the announcement.

The result is a rare view into the valley's lost communities, and a measure of how much stored water has already been used to keep the river flowing.

Why it matters

The reappearing village is a vivid image, but the number that matters is the 15 metres. A reservoir that has to be drawn down to keep a river alive is a buffer being spent, and buffers do not refill on demand. Czechia's case shows why drought planning needs to treat storage as a finite climate-adaptation asset.