"No one's going into emergency posture" yet, DeSantis said, but authorities would monitor for a strengthening storm. "We've got to be ready no matter what."
Some cities and counties across Florida's coastal and low-lying areas, including Pembroke Pines and Miami-Dade County, were offering sandbags to residents to shore up their homes Friday morning.
As a Pacific storm, Hurricane Agatha caused flooding and mudslides that killed at least 11 people and left 20 missing in Mexico, officials said. It caused rivers to overflow their banks and swept away people in homes, while other victims were buried under mud and rocks.
Agatha made history as the strongest hurricane ever recorded to come ashore in May during the eastern Pacific hurricane season since 1949. Climate scientists say tropical systems will become more powerful and destructive because of global warming.