NEW : Hanna goes from 80-mph winds to 135-mph winds in six hours . Eight of the country 's 10 departments underwater , he said . Hanna to pound U.S. , could regain hurricane strength . Hanna expected to make Bahamas landfall by Saturday or Friday .
NEW : Hanna goes from 80-mph winds to 135-mph winds in six hours . Hanna to pound U.S. , could regain hurricane strength . Hanna expected to make Bahamas landfall by Saturday or Friday .