From Jeff Masters:
http://www.wunderground.com/blog/JeffMasters/comment.html?entrynum=325&tstamp=200603The astounding Hurricane Season of 2005 has extended its grip on the record for most Category 5 hurricanes in a season. According to the National Hurricane Canter report on Hurricane Emily released earlier this month, Emily is now recognized as a Category 5 hurricane. This brings the record for most Category 5 hurricanes in a season to four (Emily, Katrina, Rita, and Wilma). The old record was two Category 5 storms, set in 1960 and again in 1961.
Emily is the earliest-forming Category 5 hurricane on record in the Atlantic basin and the only known hurricane of that strength to occur during the month of July.(snip)
---------------------------------------------------
( Emphasis added )