Civilization collapse in this context still means north america will be fine, northern europe (especially north east Europe) will also most likely be fine. I want everyone to make sure they understand who will be most impacted by this shit.

Not sure about Northern Europe, but from what I've heard Central Europe is quite vulnerable. I remember reading that The Atlantic Ocean current is in danger of disappearing/reversing, which will make the relatively mild climate of Central Europe similar to the northeast of the United States. Which obviously isn't an extinction event, but it can be catastrophic as they'd need to adapt their crop growth and increase their dependence on natural gas (which if I'm not mistaken is the primary means of heating homes there).