It was a birthday that Tyra Hilliard will never forget. On April 27, one of the most powerful tornadoes in U.S. history hit Tuscaloosa, Ala., the city where Hilliard, PhD, CMP, works as an associate professor at the University of Alabama. Classified as a 5 on the Enhanced Fujita scale, the most powerful possible classification, the tornado had winds of about 200 miles per hour and stretched a mile wide. It was among the largest twisters from a system that produced a reported 211 tornadoes ...

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