Another scenario

I decided not to cover the electrical thing in the last post, but just suppose?

Let's pretend that something did happen that destroyed the electrical infrastructure. That could be anything from a shortage of gas (everything has consequences, remember?) to terrorist attacks on the electrical system. But the electrical system is gone. Kaput. Finis. No more electricity except the bits and pieces from renewable sources such as home-mounted solar panels or windmills. The solar and wind farms are disconnected from the distribution apparatus because the rest of the infrastructure is totaled.

Without some viable alternative ("You keep using that word. I do not think it means what you think it means") what would happen?

It depends largely on the time of year and the location, but lets just say big city summer, and let's make it an immediate disaster rather than a slow burn.

My opinion:

Most hospitals can't function for more than 24 hours on separate generator power
Radio communication would go down quickly, leaving whatever area was affected in communication blackout
Transmission for cell phones would end (probably within 24 hours)
Lights and air conditioning would end, air movement in most buildings would end
Computers, electric cars, etc, would last through one battery use
Anyone reliant on life support is dead within 24 hours after the power ends unless they can get to a location with backup power
Anyone with refrigerated medication (such as insulin) is dead within 48 hours unless they have access to alternative power
All refrigeration goes down immediately. Stores lose anything that has to be refrigerated within 24 hours. A deep freeze will last up to 72 hours (if you're not mobbed by people coming for your food)
Anyone who cannot leave their home and has no one to help them is dead within two weeks
Since most people in a city environment keep only a week's supply of food on hand, within two weeks the mobs are out looking for anything they can eat
Addicts roam the streets, unable to get their next fix. They target pharmacies, doctors offices, and hospitals
Those people who are left after the first two weeks head for the countryside

So no communication, no hospitals, no refrigeration, no AC...piece of cake.

And no, I'm not going to write this. If you want it, that's your job. :)