"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."These folks are among the country's most dependable businesses at restarting after a disaster. Putting it another way, if your local Waffle House is closed, you know the weather is bad.
Read the entire article: How to Measure a Storm's Fury One Breakfast at a Time