Captain Paul Allen Laux

Captain Laux drove a water tanker to the scene of a reported structure fire. When the report turned out to be steam, the incident commander released all units to return to station.

As reports were completed and units prepared to return to station, a firefighter noticed that the door to the tanker was open. As he looked inside, he observed Captain Laux slumped over the wheel and unconscious. Captain Laux was removed from the tanker and provided with medical care, including the arrival of ALS. No defibrillator was available initially but one was utilized upon the arrival of ALS.

Captain Laux had a history of cardiovascular disease including bypass surgery but had been cleared for fire fighting by his personal physician.

For more info see NIOSH report

http://www.cdc.gov/niosh/fire/reports/face9905.html