Florida health officials have declared local states of emergency in Hillsborough, Pasco, and Pinellas counties following a rare outbreak of dengue fever. The state has recorded 190 locally acquired cases and one confirmed death in 2026, marking the second-highest annual total in state history.
The current surge is wildly unusual
for the region, according to Chris Wilkerson, a spokesperson for Hillsborough County. While Florida often sees travel-associated cases, the spike in local transmission has pushed authorities to implement emergency measures to control mosquito populations and protect public health.
Emergency Declarations in Tampa Bay Counties
Leaders in Hillsborough, Pasco, and Pinellas counties have all issued local states of emergency to combat the spread of the virus. These declarations provide officials with expanded authority to bypass standard procedures and quickly approve expenditures for mosquito control.
In Pasco County, the declaration lasts for seven days unless rescinded. Michael Cox, Commissioner of the Pasco County Mosquito Control District, compared the current situation to the cone of uncertainty before a hurricane, noting that while a threat is pending, the exact point of impact remains unknown.
Pinellas County officials report a simultaneous increase in West Nile virus activity within sentinel chicken coops, which serves as an early warning for potential human transmission.
Case Counts and Regional Distribution
The Florida Department of Health reports that 190 locally acquired cases have occurred so far in 2026, alongside 212 travel-associated cases. This total is significantly higher than the 62 cases reported last year, though it remains just below the 199 cases recorded in 2023. The virus has been detected in 17 mosquito pools this year.
| County | Case Status |
|---|---|
| Hillsborough | More than 170 cases (36 new from Sept. 13-19) |
| Pinellas | Seven total cases |
| Pasco | Two confirmed cases; others under investigation |
| Polk | First human case of locally acquired dengue reported |
Doctors at Tampa General Hospital estimate they have treated more than 100 dengue patients. Michael Johansson, a Northeastern University researcher, noted that while travel-associated cases are within normal ranges, the locally acquired numbers in the Tampa Bay area are clearly elevated compared to the last decade.
Medical Warning Signs of ‘Break-Bone Fever’
Dengue is often called break-bone fever
due to the agonizing pain it causes in the joints and bones. Dr. Kartik Cherabuddi, chief hospital epidemiology officer at Tampa General Hospital, stated that the intensity of the body aches is the primary reason patients seek emergency care.
Most people recover after about a week, but a small percentage develop severe disease. Dr. Cherabuddi notes that roughly one in 20 symptomatic patients experience severe illness.
It’s the time the fever breaks. The next two days is when you can have more severe warning signs. If you have severe abdominal pain, persistently throwing up, bleeding from the gums or other sites, difficulty breathing — and critically, that’s when the fever starts to go down is when these could develop. That’s when you absolutely have to go to the
Dr. Kartik Cherabuddi, chief hospital epidemiology officer at Tampa General Hospital
Environmental Drivers and Transmission
The outbreak is driven by the presence of Aedes aegypti and Aedes albopictus mosquitoes. These species thrive in warm climates and often live near human communities. Experts suggest that heavy rainfall and warmer temperatures have accelerated mosquito reproduction.
Transmission occurs when a mosquito bites an infected person and then passes the virus to another human. Richard Wamai, a Northeastern professor, attributes the global spread of such diseases to climate change, migration, and gaps in health education. The virus is now endemic in over 100 countries, with global cases rising from 500,000 in 2000 to 14.6 million in 2024.
To mitigate the risk, officials are urging residents to adopt Drain and Cover
principles.
- Dumping out standing water around properties to remove breeding sites.
- Wearing light-colored, long-sleeved clothing and closed-toed shoes.
- Using CDC-recommended repellents containing DEET, Picaridin, IR3535, or Oil of Lemon Eucalyptus.
Current Containment Efforts and Outlook
Mosquito control teams are currently conducting home inspections, trapping, and monitoring. There are some positive indicators: recent mosquito samples from the last two weeks have returned negative for the virus, and Hillsborough County Mosquito Management reports that potentially infected female mosquitoes are not passing the virus to their offspring.
Despite these signs that new infections may be waning, some experts believe the threat is permanent. Michael von Fricken, a University of Florida associate professor, suggests that this level of risk may become the new normal
.
While the current local chains may be smaller or isolated, it remains unclear whether the outbreak stems from a single sustained chain of transmission or multiple separate introductions into the region.