The Florida Division of Emergency Management put the official toll at 34, but it excluded eight known deaths in the Keys and eight more in a nursing home in Hollywood, north of Miami.
Those deaths put the toll state-wide to 50.
Alberto Moscoso, spokesman for the Florida Division of Emergency Management, the deaths in the Keys were not included because Monroe County, which includes the hard-hit island chain south of Miami, had yet to file its official count.
The Monroe County Twitter account posted it had recorded eight deaths Wednesday -- although the Miami Herald reported nine.
At least a quarter of houses in the Keys were destroyed, according to the Federal Emergency Management Agency (FEMA) -- while 65 per cent of buildings suffered damage.
Irma also killed at least another 40 people in the Caribbean before hitting the Keys September 10 as a Category Four hurricane with winds of 180 miles (295 kilometers) per hour, and then barreling up the length of the state.
Now, the Caribbean is bracing for Hurricane Maria -- which was upgraded to a Category Four storm Monday.
Maria is expected to make landfall in Puerto Rico on Wednesday before heading north.
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