Waffle House Index helps Southerners and FEMA judge a hurricane’s severity

Golden hashbrowns, gravy-smothered biscuits and crispy waffles with a hearty helping of maple syrup are among the classic Southern comfort foods. But when hurricanes tear through Southeastern towns, the hot meals and bold yellow signs of the local Waffle House provide another kind of comfort.

If a Waffle House stays open in town, even in a limited capacity, neighbors are reassured that the coming storm is unlikely to cause devastation. A closed location of the dependable diner chain has come to indicate impending disaster. The metric is known as the Waffle House Index.

What might sound like silly logic has become one of the most reliable ways for Southerners — and even federal officials — to gauge a storm’s severity and identify communities most in need of immediate aid.

About two dozen Waffle House locations remained closed in the Carolinas and the chain’s home state of Georgia on Tuesday, nearly two weeks after the states were among…