Jacksonville Fire and Rescue said they have a reported fire at the Starbucks in San Marco Square under control.
JFRD crews headed to the scene around 5:46 a.m.
Firefighters believe a possible power surge nearby may have been the cause.
The store currently does not have power and employees tell reporter Cole Heath, they are unsure when the store will reopen.
No one inside the store at the time of the reported fire.