A heat index of 110°F is forecast across nearly the entire state of Florida today, with four National Weather Service offices issuing coordinated Heat Advisories that cover the Tampa Bay area, Central Florida, Northeast Florida, South Florida and Southeast Georgia in one of the most widespread single-day heat advisory issuances the state has seen this season.
A Near-Statewide Event
Four NWS offices — Tampa Bay, Melbourne, Jacksonville and Miami — issued advisories in effect today through 7 PM EDT, blanketing the Florida peninsula from the Georgia border to the Florida Keys mainland.
Tampa Bay area (NWS Tampa Bay): Pinellas, Hillsborough, Polk, Manatee, Sarasota, Charlotte, Lee, Hardee, Highlands, DeSoto, Sumter and surrounding coastal and inland zones from 11 AM — including Tampa, St. Petersburg, Clearwater, Sarasota, Fort Myers, Cape Coral, Sanibel, The Villages, Lakeland, Bradenton, Punta Gorda and Englewood.
Central Florida (NWS Melbourne): Orange, Seminole, Osceola, Lake, Volusia, Brevard, Indian River, St. Lucie and Martin counties from 11 AM — including Orlando, Kissimmee, Melbourne, Daytona Beach, Cocoa Beach, Fort Pierce, Vero Beach, Titusville, Sanford and New Smyrna Beach. This zone includes the Kennedy Space Center corridor.
Northeast Florida and Southeast Georgia (NWS Jacksonville): Baker, Nassau, Duval, Clay, Alachua, Putnam, Flagler, Marion, Bradford, Union and adjacent Georgia coastal counties from 11 AM — including Jacksonville, Gainesville, Ocala, St. Augustine, Palm Coast, Fernandina Beach, Brunswick, St. Simons Island and Kingsland, Georgia.
South and Southeast Florida (NWS Miami): Palm Beach, Broward, Miami-Dade, Collier, Hendry, Glades and mainland Monroe counties from noon — including Miami, Fort Lauderdale, West Palm Beach, Boca Raton, Coral Springs, Naples, Marco Island, Pompano Beach, Hollywood and Miramar.
What 110°F Feels Like in Florida
Florida is no stranger to summer heat, but a statewide 110°F heat index is notable even here. The combination of air temperatures in the low-to-mid 90s with Florida’s characteristically high relative humidity — typically 60 to 80 percent during afternoon hours — pushes the apparent temperature well above the actual air temperature. At 110°F, prolonged exposure without access to cooling triggers heat exhaustion rapidly and heat stroke within hours in vulnerable individuals.
Who Is Most at Risk
“Young children and pets should never be left unattended in vehicles under any circumstances,” the NWS Melbourne office warned — a critical reminder on a day when car interiors can reach 140°F or more within 20 minutes. Outdoor workers, the elderly, people without air conditioning and anyone with heart or lung disease face heightened risk throughout the afternoon.
Heat stroke — hot, red or dry skin; rapid pulse; confusion — requires an immediate 911 call. Heat exhaustion presents as heavy sweating, weakness, nausea and dizziness and should be treated by moving to a cool location and drinking fluids promptly.
How to Stay Safe Today
The guidance from all four NWS offices is consistent: stay in air-conditioned spaces from 11 AM to 7 PM, drink water continuously, wear lightweight and loose-fitting clothing, avoid strenuous outdoor activity during peak afternoon hours, and check on elderly neighbors who may not have reliable cooling.
For outdoor workers, OSHA recommends scheduled rest breaks in shaded or air-conditioned environments. The advisory expires at 7 PM EDT as temperatures begin to ease and coastal sea breezes strengthen. Track updates through weather.gov/tbw, weather.gov/mlb, weather.gov/jax and weather.gov/mfl.
