This region endured similar major floods in 1922, 1942 and 1957 though the current disaster was "extraordinary and all previous 'records' have been surpassed," she added.The Ural River flooded Russia's Orenburg region in particular, while the Ishim — which feeds the Siberian regions of Tyumen and Omsk, and northern Kazakhstan — also burst its banks.

Unprecedented flooding strikes Kazakhstan and Russia, marking the worst in decades for the region. The worse than usual seasonal floods have been caused by melting snow. Across the border in Russia, an oil refinery in the city of Orsk, 1,800km southeast of Moscow, has stopped operations because of the floods.

Powerful storm surges, coinciding with the monthly astronomical high tide, are flooding low-lying streets in Portland and other coastal communities.