I always try to prepare for the possible failure of electricity. We have electric central heat and heat pump with air conditioning and elec. cook stove. We also have a propane gas heater for back up, or if we only want to see the flames. It is like a fireplace in appearance and is 100% heat recovery. We have a small propane 3 burner cook stove for emergencies. We buy 1/2 of a steer for meat and have it butchered and wrapped. To keep the freezer and fridge. working without elec. we have a small 120v/240v gasoline powered gen. set.
So if there is a loss of power we are ok. Unless a tree falls on the house. Then it is all for naught.
Most critical institutions, like hospitals have backup gen. sets that start up and come on line within 5 to 10 seconds. if it is the latest design gen. set system. The older smaller hospitals have a gen set that maintainence can go out and start up. It will provide power in 5 or ten minutes.
When I worked for Caterpilar we installed 5 large diesel powered gen. sets. They bought a maintainence package, so we serviced them routinely. We guaranteed that they would come on line and supply voltage within 4 seconds of the failure. This was a very large hi tech mfg. company and any sustained loss of power would cost them millions of dollars.
If you are faced with this type of emergency, it is very inconvenient but it is certainly survivable. So I don't think we have too much to worry about.
I doubt that the terrorist threats we face would have the capeability to destroy a dam or the power house. There are 3 large dams with power houses within 75 miles from my home. All of them stepped up their security. When we drive by them we can see the security patrols. In an elevated level of threat they will step it up and stop and interrogate cars & especially trucks that come close to the dams. Even then, these dams do not give easy access to get close to them. The military found out how hard it was to destroy a dam in ww2 in Norway. They finally developed a bomb that would bounce 3 times on the surface of the water to actually hit the dam. Our satelite guided bombs now in use, would hit the dam for sure. But at least for now we don't face that threat.
There are a surprising number of things that were always in operation and now a few more to handle this kind of situation. I don't think we should worry ourselves too much over this. After all worrying will not stop anything. A little preparation even on a small scale will help. There are camp stoves using gasoline or propane and battery powered radios etc. Things not too expensive that will do a lot for us. If it is an act of nature or terrism. I think it is important that we do not become over anxious about the future. All it will do is make our lives miserable and cloud our ability to function. We can educate ourselves, take the necessary steps we can afford and then deal with it if it happens.
Outoftheorg