Will any of the Wild life remain after this extreme cold up north?
It isn't unusually cold in the far North. The cold in the East is cold air that broke away from the Polar vortex.
yes, there will likely be some animals dying, but most are adapted to that and more extreme cold.
The sick or weak will likely not survive.
I doubt even the polar Bears survive this one
Any that aren't in their shelter already are capable of surviving in frigid temps.