Will someone please address the true threat, i.e. the Reapers?
How well would our underground electric transmission network against masive solar flare of doom?
Actually the more I think about it the big solar flare of doom is only likely to be a slight inconvenience.
80-90% of the wire ran would still be usable, rebuilding generators isn't super hard. A lot of the electronic systems we have are fairly emp resilient surprisingly.
OK, here's another potential catastrophe... Global Pandemic.
Here's one of my favorites candidates, the Marburg Virus:
Note at about 1:30 how the virus quickly spread through the health care workers.
Imagine an infected person with a highly contagious lethal virus gets on a plane to a first world country. Then the passengers all disperse, maybe some get on other planes... This is the scenario that keeps Public Health Officials awake at night.
Global pandemic is my favorite as I am very likely to survive it and the looting opportunities are AWESOME.
I could totally drive a Ferrari and move into a nice big house with a potable well and sufficient solar panels to meet my power needs.