Tex. Civ. Prac. & Rem. Code 78.054
Liability: Firefighter Under Contract with Government
A firefighter who responds to a marine fire emergency under a contract with a governmental agency will have the same protections from being held legally responsible that employees of the contracting governmental agency enjoy.
A fire fighter is liable for damages described by Section 78.052 only to the extent an analogous employee of the governmental unit with which the nonprofit fire department is contracting would be liable and is entitled to the common law immunities applicable to the employee of the governmental unit.