Governor: 14 Florida Zika cases likely caused by mosquito

The governor said the Centers for Disease Control and Prevention would issue a travel warning to pregnant women or those thinking of becoming pregnant to avoid a square mile area in Miami-Dade County, where officials believe the active transmissions of Zika are occurring.

U.S. health officials do not expect widespread outbreaks of the sort seen in Brazil and in Latin America and the Caribbean, in part because of better sanitation, better mosquito control and wider use of window screens and air conditioners.

The area, known for murals spray-painted across warehouses, art galleries, restaurants and boutiques, is rapidly gentrifying and has a number of construction sites where standing water can collect and serve as a breeding ground for mosquitoes.

On Friday, Florida agricultural officials immediately announced more aggressive mosquito-control efforts, and Florida politicians rushed to assure tourists it's still safe to visit the state.