Unemotional Critical Thinking
Use your internet search engine to review three pages about power grid vulnerability.
Click on Utility Grid in the menu above for the links that I have found listed by publishing date.
When you search USA power grid vulnerability you may find articles that believes that if the whole country is hit 90% of the population will die.
There theory dose not account for our military and Relief agencies of other countries that are going to come in and help.
Every cruse ship on the planet will head to the United States to take people off the coast.
If the two thirds of the utility grid ( east coast ) is down FEMA, National Guard, Red Cross, Christian charities and large corporations who are in Texas and the west coasts states will send in buses to evacuate people who have not prepared.