Fire and Ice
Some say the world will end in fire,
Some say in ice.
From what I've tasted of desire
I hold with those who favor fire.
But if it had to perish twice,
I think I know enough of hate
To say that for destruction ice
Is also great
And would suffice.
The impetus of this post has more to do without current outdoor conditions in Central North Carolina than actual conviction.
However, between the Atlantic Conveyor concerns (plausible) and the ice age-magnetic pole reversal theories (maybe not as plausible), nuclear winter (the cold might be moot), and volcanic activity (low probability- high impact) there are a number of scenarios that would lead us in this direction.