This likely wasn't some anomalous year of tragedy.
This is just the new normal.
Binro the Heretic In the far future, the last remnants of humanity will gather around the fire in the shelter of a reinforced concrete bunker. While acid rain pounds on the roof and the their dinner of unseasoned seared spiderat meat churns in their stomachs, they will sit in silence and listen to a withered old crone, last survivor of the year 2016, share tales of that awful year that was the beginning of the end.
Even the bold and strong who dare to leave the safety of the compound to hunt the giant armored spiderats shudder.