Russian city in state of emergency after 'radiation leak'

Russia has ordered mass evacuations in four of its regions as water levels in overflowing rivers in swathes of the country continue to rise, with cities braced for a new peak in the southern Urals and western Siberia. Moscow has called the floods the worst in decades, introducing a state of emergency as water covered entire cities and villages.

A dam in Orsk, Russia, burst, prompting evacuation of up to 4,000 houses and 10,000 residents. Efforts to reinforce the dam are ongoing. Unverified videos show...