As of August 29, 2023, 49 counties in Florida are under a state of emergency due to Hurricane Idalia. The counties are:
- Alachua
- Baker
- Bay
- Bradford
- Brevard
- Calhoun
- Charlotte
- Citrus
- Clay
- Collier
- Columbia
- DeSoto
- Dixie
- Duval
- Flagler
- Franklin
- Gadsden
- Gilchrist
- Gulf
- Hamilton
- Hardee
- Hernando
- Hillsborough
- Jefferson
- Lafayette
- Lake
- Lee
- Leon
- Levy
- Liberty
- Madison
- Manatee
- Marion
- Nassau
- Orange
- Osceola
- Pasco
- Pinellas
- Polk
- Putnam
- Sarasota
- Seminole
- St. Johns
- Sumter
- Suwannee
- Taylor
- Union
- Volusia
- Wakulla
The state of emergency was declared out of an abundance of caution to ensure that the Florida Division of Emergency Management can begin staging resources and Floridians have plenty of time to prepare their families for the storm.