Almost 6,300 houses have been flooded by rising waters in the southern foothills of Russia’s Ural Mountains after two dam breaches, the regional authorities said on Sunday. In the city of Orsk alone – where more than 200,000 people live – 4,500 houses were underwater. Videos and pictures showed that in some places only the roofs of buildings were protruding above the water. A state of emergency has been declared in the region. Civil Defence Minister Alexander Kurenkov described it as a “critical situation” on Sunday as he visited Orsk. More than 4,000 people had been brought to safety, while 1…