Most government entities feel obliged to rescue people who have gotten into bad situations and that sort of thing is a) dangerous for the people doing the rescuing and b) expensive.

I'm not much on arresting people who don't want to be evacuated, but I can see why county governments resort to it at times. Maybe you could petition your state to set up a legal document that says, "I chose to stay and take the consequences, you don't need to save me." It might not salve anyone's conscience as they watch you disappear into the flood waters, but at least your choices would be yours and that's all you're asking for, yes?