Astrodome Lockdown Explained?

A story on the AP wire describes Red Cross distribution of debit cards to storm survivors evacuated to Houston and snafus that arose in the process. It doesn't actually mention the lockdown of the Astrodome reported first-hand by Badgerbag, but it does allude to police being called in for "crowd control." The shelter's head, Coast Guard Lt. Joseph Leonard, is quoted as saying "We have a very dynamic situation outside."

I speculate that this "dynamic situation" prompted shelter officials to lock the dome down, shutting out countless storm survivors as well as relief workers.

NB: I've gotten some feedback indicating that some people aren't sure whether Badgerbag's eyewitness account is authentic. Badgerbag might shield her public identity on the Internet, but she is a real person whom I have met and for whose integrity I have a high regard. If she says she was there, she was there. If she says she saw it, she saw it.

(via SFGate)