Photo: Louisiana National Guardsmen convoy to a boat launch to conduct search-and-rescue missions near Maurepas, La., Aug. 17, 2016. The Louisiana National Guard has been conducting flood response and recovery missions, as directed by Gov. John Bel Edwards, since Aug. 12. Louisiana Army National Guard photo by 1st Sgt. Paul C. Meeker
See:
https://www.facebook.com/TheNationalGuard/videos/10157235348325648/
See also:
Govern, Kevin H., Chapter 23: Defense Support of Civil Authorities Responding to Natural and Man-Made Disasters (December 03, 2015). U.S. Military Operations Law, Policy, and Practice (Oxford 2015). Available at SSRN: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2689907