As Mark Steyn has said - a future dictator of the United States will never need to declare martial law. He will only need to declare a weather emergency to keep everyone indoors, and Americans wouldn’t venture out until they are told its all clear.
I am in Upstate NY - and for a week, all we heard about was how bad the storm would be for us, even though we aren’t close to the ocean.
All we had was a some moderately heavy rain for a few hours, that’s all - and yet the hype convinced everyone to close the schools, cancel all events, and scare everyone into buying up supplies.
Obama might try to delay the election because of what you say in your post.