Before disasters people will often scour stores to hoard food and other essentials. We are now faced with changes in our global climate that are as bad, or worse, as our earlier worst case scenarios and a species die off that is unprecedented (Nature article, subscription required):
…biodiversity loss is accelerating globally. Some 12% of all bird species, 23% of mammals, 25% of conifers, 32% of amphibians and 52% of cycads are threatened with extinction1, and climate change alone might commit an additional 15 to 37% of extant species to premature extinction within the next 50 years.
So, we have begun to hoard.