| Name | William O'Brien |
| Agency | Chicago Fire Department |
| Rank | Firefighter |
| Type of Firefighter | Career |
| Age Range | [Unknown] |
| Sex | Male |
| Date of Birth | 0/0/0 |
| Date of Death | 7/15/1917 |
| Cause of Death | Stress/Overexertion , Contact/Exposure |
| Nature of Death | Heart attack , Burns |
| Attribute of Death | [not applicable] |
| Type of Duty | Firefighting operations |
On July 13, 1917, Chicago Fire Department Firefighter William J. O’Brien of Engine 22 was fatally injured in the line of duty while fighting a garage fire on Baton Street. O’Brien suffered gasoline burns and was treated at Alexian Brothers Hospital, but he died from his injuries on July 15.
Citations:
“Fireman Burned by Gasoline,” Chicago Daily Tribune, July 14, 1917.
Obituary of William J. O’Brien, Chicago Daily Tribune, July 16, 1917.