I can see your point, moonjen, but I used to be in the Air National Guard, and after one experience of trying to coordinate comm for forty guys who were getting soaked and half-frozen and generally risking their necks to get to two families who hadn't wanted to evacuate their beachside homes in a nor'easter I can see the authorities' side too. They (the families) sure yelled for help loud enough when their houses started to tilt over.
There's also the problem of looting in an evacuated area to deal with, so... *shrug* Evacuations aren't perfect solutions, but they've saved a lot of lives. If I got asked to clear out, I know I would. I pay attention to fire alarms in public buildings too.
What's a "frog strangler"? Sounds dangerous!