Tex. Civ. Prac. & Rem. Code 78.151
Liability: Participating in Fire Fighting Training Exercises
An individual who participates in fire fighting training exercises will not be held legally responsible.
Liability for Training Exercises
A person is not liable for damages resulting from the person’s execution of a training exercise intended to prepare the person to respond to a fire or emergency to which this chapter applies to the same extent that the person would not be liable under this chapter for damages resulting from the person’s actions in responding to a fire or emergency.