The Florida Highway Patrol is investigating at least two deaths in Hardee County related to the hurricane.
The SUV was driving on flooded Sweetwater Road, near the Charlie Creek Bridge, when it was swept away by floodwaters on Friday after Jan, according to police.
One person in the SUV was found dead and the other alive. The third resident was not found immediately.
An unknown person was on the territory on Monday. Authorities are working to confirm if this is indeed a missing person.
The investigation into the incident is ongoing.
All passengers were from Jacksonville, according to a news release. The ages of the three men have not been released.