"Martial law" is the rule of the military commander on the battlefield. It has no legal basis in the Constitution. Just because a hurricane hits a city, or some other disaster strikes, doesn't mean that one ought to lose their First Amendment free speech rights...

Tyranny cannot endure. Hitler, Genghis Khan, Attila, Tamerlane, Bush-Cheney, Lehman Brothers....are all gone, they were swept aside. Justice and the people will prevail in the end.