Florida reports over 250 locally acquired dengue cases in 2026
Health officials say the outbreak, centered in Hillsborough County, has triggered a local emergency and intensified mosquito control efforts.
Florida health authorities have confirmed more than 250 locally acquired dengue fever cases in 2026, with the majority reported in Hillsborough County near Tampa. The Journal of Emergency Medical Services described the situation as the largest dengue outbreak in several decades on the continental United States.
In response, county officials declared a local emergency and began round-the-clock insecticide applications to curb the mosquito population that transmits the virus.
Dengue fever is a mosquito-borne viral illness that can cause mild symptoms or, in some cases, progress to severe disease requiring hospitalization. There is no specific cure; treatment focuses on pain management and supportive care.
The World Health Organization noted a record 2024 dengue season worldwide, with more than 14.6 million cases and over 12,000 deaths. Climate change, which lengthens mosquito breeding periods, is cited as a factor in the disease’s expanding range, including parts of the United States.
Travelers to Florida, especially the Tampa area, are advised to protect against mosquito bites by wearing long sleeves and treated clothing and using insect repellent.
"If you develop symptoms such as high fever, severe headache, muscle and joint pain, or notice signs of severe dengue like abdominal pain or persistent vomiting, seek medical attention promptly," health officials warned.
Dengue is not transmitted person-to-person, so the risk to companions is limited to mosquito exposure. Authorities recommend vigilance but do not advise cancelling travel plans, emphasizing that appropriate precautions can reduce the risk of infection.