Yur friend should take a gander at local history for hazard history. hurricanes and tornadoes for the Midwest and south, along with floods. The west coast is known for earthquakes, but there is a zone in the Midwest that haa also experienced shakers (New Madrid). The USGS -
https://www.usgs.gov/programs/earthquake-hazards is a great resource.
I think that anyone serious about prepping should acquire first aid training - the more the better. It comes in handy in normal life, as well.
If you have outdoor interests - hiking, camping, or similar the gear that you acquire will often be of use in tight situations - experience speaking.
The Prepared is a decent site, but not quite up to ETS. Way too many survivalist sites are rather political and pay way too much emphasis to potential civil strife and firearms.
Wildfire and domestic conflagrations are a potential nearly everywhere, much more a likely problem than looting mobs