Complex sentence: The tornado was at the time the seventh deadliest in Alabama history, killing one more person than in a tornado that hit Alabama on March 21,1932; a young boy died nine days after this event from head injuries.
Split into simpler sentences: The tornado was at the time the seventh deadliest in Alabama history, killing one more person than in a tornado that hit Alabama on March 21,1932. One young boy died nine days after this event from head injuries.