From BBC:
Floods in the Russian city of Orenburg have raised water levels to two metres above critical, leaving just the roofs of some houses showing.
The city’s mayor urged many residents to leave home, as sirens sounded. Levels in Orenburg are likely to peak on Friday, but floods are expected to spread through neighbouring regions over the coming days and weeks. Kazakhstan has also been badly affected, with 100,000 people evacuated from their homes in the last week. The flooding is being described as the worst to hit the region in 80 years.