What I know about global warming vs ice age is that global warming can CAUSE an ice age, by increasing the air born humidity from evaporated water, causing more snow to fall everywhere, causing more sunlight to be reflected back to space instead of absorbed by the ground, causing winter not to go away. Plus the usual stuff about the great ocean currents breaking down and so on.

There's no denying that everywhere has been hotter in the summer, not just north america, and winters are getting drastic again.