Like many other states, Texas has a Good Samaritan Law which protects citizens in the event that they opt to provide emergency medical assistance.
The premise of the law is that if an individual voluntarily and in good faith volunteers to assist another individual experiencing a medical emergency; he or she will not be held liable for any damages that such care may cause.
In addition, it is also a protective clause for a volunteer first responder and to unlicensed medical personnel that are not licensed within a medical profession.
There are exceptions:
Willful or Wanton Conduct
Expectation of Remuneration
Cause of Harm
The Texas Good Samaritan Law has been revised many times so its always a good idea to be familiar with last rendition.
Information retrieved from https://www.hg.org/article.asp?id=18803