From KUT:
This summer, there’s a higher likelihood than ever that Texas might not have enough electricity to go around. If you turn on the AC and nothing happens, you’ll want to know why. It helps to remember legendary Led Zeppelin drummer John Bonham.
Let me explain.
The electric grid is a network of transmission lines that connects power generators to users. The grid has a beat. It doesn’t sound very pretty, kind of a low hum. It is the sound of 60 hertz, the frequency electricity runs over transmission lines.