Continuous state of emergency

A per curiam affirmance issued today by the Fifth Circuit has an odd little detail:

In July of 2008, Lockett was driving in his vehicle to a class at the Southern University of New Orleans (SUNO). At the same time, two military police officers, Jonathan Bieber and Brandt Arceneaux, were conducting patrol in the area as members of the National Guard Task Force assisting the New Orleans Police Department (NOPD) with law enforcement duties pursuant to an order issued by Governor Jindal after Hurricane Katrina. Bieber and Arceneaux observed Lockett’s vehicle and believed it to be traveling over the speed limit. Based on this observation, the defendants effectuated a traffic stop of Lockett.

Why were military personnel conducting traffic stops three years after Katrina?