To resolve these engineering gaps, the United States implemented the in 2007. The EF-Scale utilizes 28 Damage Indicators (DIs) —such as single-family homes, strip malls, trees, and transmission towers—and evaluates several Degrees of Damage (DODs) within each indicator to establish an accurate assessment. The Enhanced Fujita (EF) Rating Breakdown
The EF-Scale categories are based on 3-second wind gusts inferred from observed destruction: Wind Speed (mph) Typical Damage Weak: Minor roof damage, broken tree branches. EF1 Weak: Roofs peeled, mobile homes pushed off foundations. EF2 tornado ratings