We have a rudimentary "disaster" plan and emergency contact procedures for immediate family. Includes escape routes to get out of the house in case of fire, etc., and two-way radios in each car (handheld CBs) for communication if regular lines are out. We also have an emergency meeting point about 5 miles outside the city, on high ground (of course!). Also, we carry emergency supplies in our cars. Just basic stuff, mostly.
A good friend of mine stockpiles enough food, etc., to live for six months, independently. He obviously doesn't work on LBCs because his 2-car garage is FULL of survival stuff.
It's very wise to have an emergency escape plan from your home, neighborhood and general vicinity. Most State websites have emergency evacuation procedures, evacuation routes, and emergency shelter locations posted. It's good to know this stuff. Simply discussing disaster preparedness with your family and agreeing on a few simple procedures could prove very helpful if an emergency arises.
If events get really bad and require more planning that that, I'm toast, I recon.
We're not prone to earthquakes or flooding at my place, however, there is a nuclear power plant about 35 miles NE of here (North Anna Nuclear Power Staton).
I'd rather not think about another nuke disaster right now . . .