Air France Boeing 777 with 282 on board suffered technical failure, then the rescue aircraft sent from Paris was also grounded.
Emergency chiefs say that increased activity means tour companies and residents must avoid going too close to eruptions.
Intense search reveals no sign of Mil Mi-8 lost early Saturday with 12 people on board.
All ice crossings shut in Irkutsk region, local emergency service on top alert.
Three man team probing the discovery is now 'missing in tundra', say Emergency Ministry officials.
Omsk region emergency services said number of wildfires is seven to ten times above the ‘norm’.
Major rescue operation on the island of Sakhalin went on for two days.
Among those hurt are eight children, say the emergency services.
Aged 68, she has never seen a town - and refused a helicopter ride to hospital.