An acre? I got 200 out of my 2x4 raised bed this year that I’ve been playing around with and like 170 last year. Why do you say two acres per person? Google tells me that you usually get 16-24 tonnes per acre.
Now, obviously yield will be down during this but I’m not expecting it to be that bad. Tents could be an option if temperatures do get bad it’s really not difficult to heat the tent we grow our palms in.
In all likelihood if the shit hits the fan I plan to organise a local group and we can commandeer the nearby golf course for land, while encouraging everyone to use what green space they have on top. Fuck allowing that land to go to waste in those conditions. This is all obviously assuming we don’t die in the nukes or radiation.