Grand Solar Minimum 2020

The geologic record shows that across most of Oz 'globally colder' results in much less rain and much more wind. (Interestingly, that seems like where we are at the moment.) The dune fields in the central deserts become much more mobile. (Which is also how it is beginning to look at the moment.)

Not EOTWAWKI, but it could make farming even riskier and water restrictions in urban areas the new normal.

I remember reading an encyclopaedia or trivia book some time ago talking about how the last ice age occured over a matter of decades not centuries (like 80 years??). Can't see any reference to support that 'fact' with a super quick google search nor remember the name of the book I read some 20 odd years ago but would be interested if anyone comes up with anything similar. Reading that was rather sobering and occasionally I think about 'what if'. Don't actively plan for it but when I am saving seeds I often think of how alot of seeds are localised to area and what if climate changes suddenly and all we we have is stuff for opposite climate in the short and long term? Hard to plan for without having proper storage for a seedbank as seeds have a limited time for being viable but it's probably good practice to challenge what your zone is for growing plants to some degree as this can help mitigate the risk of more minor seasonal weather pattern changes and have something you can harvest. Even if it's free cuttings or a cheapy packet of seeds. At the very least you can diversify your harvest crops and localise some seeds to your area that might not normally grow there. Not a solution for ice age but it's been a wacky year in the garden.