The mayor of the southern Russian city of Orenburg urged residents to evacuate immediately on Friday as water in the nearby Ural River reached critically dangerous levels and was not expected to recede until next week.
Floodwaters in Tomsk region threatens to submerge the river banks in Seversk where highly radioactive liquid waste from the Soviet Union's nuclear weapons program for decades were injected into two unprotected underground reservoirs.
The isotope measured in air in Tromsø for now is unknown. The isotope comes from a nuclear reactor, and is used in medial diagnostic.
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