Environmentalists say the latest flooding may have sent radioactive substances into the river, potentially affecting hundreds of thousands of people living near the banks of the Tobol downstream. State nuclear agency Rosatom, whose subsidiary operates the mines at the Dobrovolnoye uranium deposit, denied that its mining facilities were impacted by the flood.

Floodwaters in Tomsk region threatens to submerge the river banks in Seversk where highly radioactive liquid waste from the Soviet Union's nuclear weapons program for decades were injected into two unprotected underground reservoirs.

The swelling Tom River in southwestern Siberia has led to a partial dam collapse in the city of Tomsk. This year’s heavy rainfall, combined with abnormally warm spring weather, has led to severe flooding in Russia’s Urals and western Siberia. So far, the floods have submerged around 15,600 homes and 28,000 land plots in 193 Russian towns and cities across 33 regions.

Extinct in the UK, and on the retreat in western Europe and Scandinavia, the species if prolific this summer in Tomsk and Novosibirsk.