I found out that my local utility company has a voluntary power conservation program (in which you get a cheaper unit rate for your electricity and gas), in exchange for the cheaper rate, the utility company may have the program members' homes supply of electricity and/or gas temporarily shut off when the power grid approaches full capacity. It is actually a great deal as long as you don't get too annoyed at resetting the timer/clock on your home appliances. It saves you money and is great for the environment.
Contact your local utility company and see if they offer a similar conservation program. Each utility company comes up with a different name for the program but in essence, the program features are the same as the above.