The first questing which comes to mind when thinking about Bugging Out is:
'What makes/forces one to Bug Out?' or "What's Bugging You?" ...
This calls for a closer look of (our) nature and the issue of disasters.
Right now i can think of:
Man - made disasters
War
Food shortage
Explosions
Chemical accident
Nuclear Explosion
Gas explosion
Peak Oil
Riots
Plundering
Social unrest
Societal collapse
Natural disasters
Vulcano
Hurricane
Tsunami
Flooding
Fire
Earthquake
A combination of the above listed.
Check: https://www.crisis.nl/