https://gov.texas.gov/news/post/governor-abbott-activates-entire-texas-national-guard-in-response-to-hurric

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: https://ssrn.com/abstract=2689907