Fair point - I thought of that after I made the above comment (which obviously started with winter scarcity) but river delta flooding is another good example of literal flood | famine food availabilty.

And, as you note, an original challenge that predates human advance into the northern environments as glaciers retreated.

The great OG mathematical challenge for humans was the "fair" recurrent remarking of land plots following a flood - how to survey land area, and how to plan for and account for food surplus to last over food scarcity.