WELDON, N.C.—When a hurricane makes landfall, the head of the Federal Emergency Management Agency relies on a couple of metrics to assess its destructive power.
First, there is the well-known Saffir-Simpson Wind Scale. Then there is what he calls the “Waffle House Index.”
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.
Full story: Waffle House Index Measures Hurricane Recovery – WSJ.com.