There are parts of North Carolina that are still recovering from Hurricane Irene. Power is being restored, highways opened, and most importantly, Waffle Houses are up and running.

One of the unofficial metrics Craig Fugate, head of the Federal Emergency Management Agency, relies on is what he calls the “Waffle House Index.”

From the Wall Street Journal:

Green means the restaurant is serving a full menu, a signal that damage in an area is limited and the lights are on. Yellow Means a limited menu, indicating power from a generator, at best, and low food supplies. Red means the restaurant is closed, a sign of severe damage in the area or unsafe conditions. 

Despite the unassuming brand, Waffle House is actually quite efficient when it comes to supply chain crisis management. Check out the video over at the WSJ.