Florida counties declare emergency over dengue outbreak with 170 cases

Three Florida counties—Hillsborough, Pinellas, and Pasco—have declared states of emergency in response to a rapidly growing dengue fever outbreak. As of September 25, 2026, Florida has recorded at least 190 cases, with Hillsborough County leading by a massive margin at 170 cases and confirming its first dengue-related death. Local officials are deploying aerial and ground mosquito control operations to curb transmission of the virus.

Hillsborough County response to the outbreak

• ▪Hillsborough County, Florida, maintains an online resource and notification system to inform residents where localized aerial mosquito treatments are occurring
• ▪Hillsborough County Mosquito Management Services is deploying aerial and ground operations and setting mosquito traps to mitigate dengue infection risks
• ▪Hillsborough County Administrator Bonnie Wise signed an executive order declaring a seven-day local state of emergency on September 24, 2026, to enable emergency measures and seek federal reimbursement

Hillsborough County outbreak

• ▪Florida state data shows that 154 of the dengue cases in Hillsborough County are of the DENV-2 strain
• ▪Hillsborough County, Florida, confirmed its first dengue-related death during the 2026 dengue fever outbreak

Distribution of dengue cases in Florida

• ▪Hillsborough County, Florida, has reported 170 locally acquired dengue fever cases, leading the state of Florida in cases by a massive margin
• ▪Health officials confirmed a dengue case in Polk County, Florida, on September 24, 2026, which was not yet reflected in the state's total count of 190 cases
• ▪Florida state data reported 190 total dengue cases, including 170 in Hillsborough, seven in Pinellas, seven in Miami-Dade, three in Orange, two in Pasco, and one in Palm Beach

Dengue transmission and symptoms

• ▪Dengue fever typically spreads to humans via infected mosquitoes, with symptoms usually presenting around two weeks after a bite, according to the Centers for Disease Control and Prevention
• ▪Common symptoms of dengue fever include fever, aches, rashes, and nausea, with treatment primarily focusing on managing symptoms and staying hydrated
• ▪Severe cases of dengue fever can be life-threatening, presenting symptoms such as frequent vomiting, stomach pain, blood in the stool or vomit, or bleeding from the nose or gums

Debatable claims

• ▪Florida counties are justified in declaring emergencies over the dengue outbreak
• ▪The federal government should reimburse local expenses for dengue outbreak responses
• ▪Aerial mosquito spraying is a proportionate response to the Florida dengue outbreak
• ▪Local governments bear primary responsibility for controlling dengue transmission