There will be a flu pandemic. The Bay Area will experience a major earthquake (as will Istanbul). NOLA will face a hurricane that will wipe out the city (oh, wait, that's already happened). And we will face a major drought. There will be war.
I can't help it, but this made ma laugh
It aren't only "big disasters" one "needs to be prepared" for. A couple of years ago, we (Belgium) had:
- Problems with all Coca Cola products. Every single item from the company was taken out of the stores (in the end, it turned out nothing was wrong with it)
- Dioxine crisis in the chicken-business. Take away all chicken from the stores AND every single item that has milk in it.
- If I remember well, pigs were also part of the dioxine crisis, so take every single item away that has some pig in it.
- There was something wrong with the fish, don't remember what, but no fish in the stores either.
Can you imagine how much was still left? On top of it all, the truckers went on strike

We didn't starve though.
"Some" people starved during the war when there was NO food (some must be taken really large here), but many people survived during the war. Many people survive in Africa also on very limited food and weird "water".
Is it good to "be prepared", sure yes, but I don't think we should panick. Avian flu, SARS (don't even remember what that was), Y2K, ... So many things that were going to destroy our world, and we are still here.