Mountaindewed mentioned Waffle House in a post earlier. Figured it was just a joke. Turns out it's a thing. I take it you saw the Wiki entry U? I had to go Google Waffle House Index. Still chuckling.

"The Waffle House Index is a metric named after the ubiquitous Southern US restaurant chain Waffle House known for its 24-hour, 365-day service. Since this restaurant always remains open, it has given rise to an informal but useful metric to determine the severity of a storm and the likely scale of assistance required for disaster recovery.[1][2] It was coined by former administrator Craig Fugate of the Federal Emergency Management Agency (FEMA).[3] The metric is unofficially[1][4] used by FEMA to inform disaster response.[5][6]"

I like folk culture oddities like this. I'm still curious so now I have to go read up on the chain. Maybe check out their menu!