DENGUE EMERGENCY: Florida Counties Declare State of Emergency as Mosquito-Borne Virus Surges
Health officials in the Tampa Bay area have declared local states of emergency amid a major outbreak of dengue fever, with Florida reporting 190 cases this year and confirming the death of an elderly woman from the mosquito-borne disease.
The declarations were issued in Pinellas, Pasco and Hillsborough counties as officials intensified efforts to control mosquitoes and urged residents to eliminate standing water around their homes.
Dengue is a viral infection transmitted primarily through the bite of infected Aedes mosquitoes. The illness is sometimes known as “breakbone fever” because of the severe muscle, bone and joint pain that can accompany an infection.
While dengue has traditionally been far more prevalent in tropical and subtropical regions outside the continental United States, Florida has experienced a sharp increase in cases this year.
The Florida Department of Health has recorded 190 cases in 2026, making it the state’s second-highest annual total on record. Only 2023, when 199 cases were reported, had a higher number.
The increase has been particularly pronounced compared with 2025, when Florida recorded 62 dengue cases. The current total is therefore more than three times the number reported during all of last year.
“This is wildly unusual for us,” a Hillsborough County spokesperson told ABC News.
The outbreak has also resulted in at least one confirmed death. An elderly woman died after contracting dengue, according to health officials.
Dengue infections can range from mild or even asymptomatic cases to severe illness. Typical symptoms can include high fever, severe headache, pain behind the eyes, muscle and joint pain, nausea, vomiting and rash. A smaller percentage of patients develop severe dengue, which can cause internal bleeding, shock and, in rare cases, death.
Officials have been particularly concerned about the conditions that have allowed mosquito populations to thrive. Florida’s persistent heat, periods of heavy rainfall and humid climate create favorable breeding conditions, while the state’s extensive travel connections with areas where dengue is endemic can provide opportunities for the virus to be introduced into local mosquito populations.
Florida’s proximity and extensive travel links to Puerto Rico have also been cited as factors contributing to the risk. Puerto Rico and other parts of the Caribbean have experienced substantial dengue activity, while the virus also circulates widely across Central and South America, Southeast Asia and Pacific island nations.
Most dengue cases diagnosed in the United States have historically involved people who became infected while traveling abroad. Local transmission occurs when a mosquito in the United States bites an infected person and subsequently transmits the virus to another person.
Health authorities in the affected Tampa Bay counties urged residents to take immediate steps to reduce mosquito breeding around their properties. Residents were advised to empty standing water from buckets, garbage cans, gutters, flowerpots and other outdoor containers where mosquitoes can lay eggs.
Officials also advised homeowners to keep swimming pools properly maintained and chlorinated and to report significant mosquito activity to local mosquito-control agencies.
Residents were encouraged to protect themselves from mosquito bites by using insect repellent, wearing clothing that covers exposed skin when practical and ensuring that doors and windows have intact screens.
The outbreak comes amid broader concern about the expanding geographic reach of mosquito-borne diseases. Health experts have warned that warmer temperatures and changing rainfall patterns can lengthen mosquito seasons and create conditions in which mosquito populations capable of transmitting dengue can flourish.
The current outbreak is especially notable because large dengue outbreaks have historically been uncommon in the continental United States. The last major U.S. outbreak outside the Texas-Mexico border region occurred in 2009.
Florida, however, has experienced sporadic locally acquired dengue cases and outbreaks over the years, particularly in areas where the mosquitoes capable of carrying the virus are established.
With 190 infections already recorded this year, officials continued mosquito-control operations across the affected counties while urging residents to take precautions and eliminate potential breeding sites around their homes.
