In Siberia's Novosibirsk, Russia's third-largest city, a major hot-water main burst, sending cascades of steaming water rushing through frozen streets and cutting off heating to scores of buildings -- and thousands of people -- amid Arctic temperatures. In the Pacific port of Vladivostok, some 3,000 people were left in the bitter cold after an above-ground heating pipeline ruptured, spewing similar volumes of steaming water. And nine hours to the west, in a string of Moscow suburbs, more than 150,000 people shivered -- and complained vociferously -- when another municipal heating pipe broke down, with engineers rushing to dig up the...