now this one I'd think they have more time to start evacuations.
I had read that warmer than normal ocean temps in the Gulf allowed Harvey to explode - I wonder if the same is true for Irma though it's obviously not in the Gulf (yet).
It's actually a pretty sound system of evacuating the Keys, at least if it's anything like it was when I lived there.
The Keys are geographically organized into three different zones; the Upper Keys (think Key Largo), the Middle Keys (between Key West and Key Largo), and then the Lower Keys (Key West and a few islands east of that). They evacuate these zones one at a time, mostly because there is one big highway (Highway 1) that spans the length of the Keys from north to south and is really the only way in or out, at least by car.