A Texas fire chief collapsed at a fire scene.
Damon Chief Hugh Ferguson, 52, was establishing a water supply when he was stricken late Monday night.
Fellow firefighters immediately went to his aid, and started CPR, Brazoria County Fire Marshal Martin Vela told reporters.
He was flown to a local hospital where he was pronounced dead.
Ferguson's son, also a firefighter, was on the scene helping with the fire.
He was involved in the fire service for 24 years.