Um, how many authorities do you suppose were watching TV instead of rescuing people off their rooftops? Since there was no electricity, no telephones, the satellites were out, just how do you suppose they were supposed to see the frantic histrionics?
Weren't the governor and others in Baton Rouge by that time? Was there absolutely no command center anywhere that had emergency power and news reception, or were emergency services working in a total and complete news vacuum? (If the latter, I suggest that's part of the emergency management problem we've been seeing this week.) I have a hard time believing that there wasn't anyone outside the scene who had access to TV coverage and the ability to communicate with those on scene, but stranger things have happened.
I have my own complaints with TV coverage at times, but I simply feel the criticism in this particular area may be a bit on the "histrionic" side itself. Anger at members of the media for not providing extensive emergency relief services might perhaps be better aimed at others, such as the government of Louisiana. This is JMHO, of course.