Hawaii dengue outbreak (2015-2016)
Hawaii's Big Island recorded 264 locally acquired dengue cases over about six months, spread by Aedes mosquitoes. It was the largest dengue outbreak in any US state before the current Florida cluster.
The outbreak subsided after circulation of the virus among the island's mosquito population declined.
It became the benchmark for dengue in US states, the number the current Florida outbreak is on the verge of surpassing.
Florida's 2026 case count is approaching Hawaii's 264-case record, with transmission still active.
