740 ILCS 75/1
A firefighter, paid or volunteer, who causes injuries or damage or enters property without permission while performing their duties will not be held legally responsible. They can be held legally responsible if acting with intent to cause harm. A fire district or organization can be held legally responsible for acts by firefighters working on their behalf.
Liability while performing duties
In case any injury to the person or property of another is caused by the negligent operation of any motorized fire fighting equipment by a compensated fire fighter or authorized volunteer fire fighter of a fire protection district or incorporated fire protection organization while he or she is engaged in the performance of his or her duties as fire fighter, and without contributory negligence of the injured person, of the owner of the injured property or of the agent or servant of the injured person or owner, the fire protection district or incorporated fire protection organization in whose behalf the fire fighter is performing his or her duties shall be liable for that injury. While engaged in preventing or extinguishing fires, any fire fighter or authorized volunteer fire fighter of a fire protection district or incorporated fire protection organization may enter upon the lands of any person, firm, private or municipal corporation or the State of Illinois to carry out his or her duties and while so acting shall not be criminally or civilly liable for entering upon such lands. In no case shall such a fire fighter be liable in damages for any injury to the person or property of another caused by him or her while engaged in the performance of his duties as a fire fighter, unless such injury results from his or her wilful and wanton misconduct.