November 13th and 14th, “power grid shutdown” exercises will be conducted by NERC. The code name of the operation is “GridEx II.”
According to the official website, their goal is to “exercise the current readiness of participating Electricity Sub-sector entities to respond to a cyber incident and provide input for security program improvements to the bulk power system.” 
Unfortunately, there is an ongoing trend of false flag attacks taking place in the same day and the same way as the “exercises” conducted by governmental institutions or with the government’s approval.  Hence, precautions may be required.
“An electrical grid joint drill simulation is being planned in the United States, Canada and Mexico. Thousands of utility workers, FBI agents, anti-terrorism experts, governmental agencies, and more than 150 private businesses are involved in the November power grid drill.
The downed power grid simulation will reportedly focus on both physical and cyber attacks. The antiquated electrical system in the United States has been one of the most neglected pieces of integral infrastructure.
The disaster drill is being described as a crisis practice unlike anything the real power grid has ever experienced. The GridEX II drill Nov. 13-14 will focus primarily on how governments will react if the electrical grid fails and, for instance, the food supply chain collapses.
If an adversary lands a knockout blow, [experts] fear, it could black out vast areas of the continent for weeks; interrupt supplies of water, gasoline, diesel fuel and fresh food; shut down communications; and create disruptions of a scale that was only hinted at by Hurricane Sandy and the attacks of Sept. 11.” 
My advice is to fill up your car’s tank with gas and buy more food than usual – just in case this is more than an exercise.
In my opinion, judging by the amount of publicity this operation received, it is not very probable for an actual blackout to take place. But it’s better to be safe than sorry, right?
By Alexander Light, HumansAreFree.com;