They're all under mandatory evac, but that's nothing new, these zones always get placed under evac., Zone A pretty much every time and B is typically voluntary depending on the strength of the storm, sometimes mandatory.
Most times people still stay. Supposedly they're "safe" up to a certain wind strength, that's why I stayed in mine during Wilma as opposed to evacuating, and I actually evacuated to a high rise in North Miami for Jeanne...also zone A mandatory evac zone, but I felt it would be more safe than staying in mine in PBC.
Many people learned after those 2 storms, and Katrina, that evacuation is much better than staying.
With this particular storm, no one knows if even the new high rises could withstand the wind. Officials are saying that they won't.
I think this is one time where residents, even stubborn South Floridians, are taking it seriously.