Tex. Lab. Code 501.026(b)
Workers’ Compensation: Disaster Volunteer
An individual who performs volunteer disaster services, during a disaster training or an actual disaster, is entitled to Texas workers’ compensation.
Coverage for Certain Services Provided by Volunteers
(b) A person not otherwise covered by workers’ compensation insurance for the services performed under this section who performs volunteer services for the state in a disaster or in scheduled emergency response training under the direction of an officer or employee of the state is entitled to medical benefits under this chapter for an injury sustained by the person in the course of providing those services. For purposes of this subsection, an injury is not sustained in the course of providing services in a disaster unless the injury occurs while the state of disaster may reasonably be considered to be in existence.