If multiple species are fleeing, that might be concerning.
The land mass of the valley has been rising for a decade, the geysers have become more active as well, after slowing down for decades. There is also the fact that the temperature of the valley floor has been rising too.
And it is past its historical cycle.
That would be funny if that is how our extinction commenced. Wouldn't have to worry about global warming anymore, well, except for the western 2/3 of North America, but that will pass quickly. The east coast and whatever is left of the mid-west would be buried under a foot or more of ash. The EMP discharge and the earthquakes will take out most of the electric grid in the western hemisphere.
Most of the nuclear plants on west coast will experience melt down, although everybody there will be dead anyhow. Might even crack the US in 2 along well established fault lines, creating a massive inland waterway from the Gulf of Mexico to well into Canada. In fact, the US military has maps that show just such a probability, should this event occur.
The rest of the planet would fall into nuclear winter, with the average global temperature falling 30-35 degrees, livestock and farming would collapse globally. About 2/3 of the very acidic ash would contaminate the Atlantic Ocean killing off that fishery, as well as disrupting the Atlantic Ocean's deep water conveyor - current. 2 years out, most ocean life would be dead.
That isn't even the worse case scenario. One thing is certain - we'll all be dead!
But then again, that could never happen, because god blesses the US of A.