Simplify the following text for a Grade 7 native English-speaking person.
Original: Hurricane Emily was not originally recorded as a Category 5 storm , but it was upgraded in the post-storm analysis by the National Hurricane Center . The 2005 season is the only season on record with four Category 5 storms on the Saffir-Simpson Hurricane Scale ; the previous record was only two .
Simplified: Hurricane Emily was one of four category 5 hurricane in 2005 .