The smoke originated from a massive brush fire in southern Miami-Dade County​, which has already burned 3,600 acres.
A brush fire led officials to briefly close U.S. 1, snarling traffic for hours for those trying to enter or leave.
Winds are expected to pick up to 10 to 15 mph with gusts up to 25 mph, humidity will be as low as 30 percent and temperatures ...
U.S. 1 reopened after a brief Wednesday closure; Card Sound Road is still shut down. Authorities don’t know when it will reopen.