Two Iowa towns are saying goodbye to their fire chief.Ken Cavanaugh died of a heart attack, but not before pulling his school bus full of children off the road and saving their lives. Cavanaugh was the fire chief in Woodward and Bouton."It's real tough. Real tough," said Karl Harris, the Bouton fire department captain."Losing one of your own is one of the toughest things you can do," Bouton firefighter Andy Wernli said.Firefighters in Boutin, Iowa, are saying goodbye to their chief and their best friend. Ken Cavanaugh died Monday of a heart attack. He'd been in the hospital since Oct. 18. That's when he became ill driving a Woodward-Granger school bus. Despite his pain, he was able to pull the bus off the highway and into a soybean field. The kids got out safely."I'm sure the first thing he was thinking about is how am I going to keep these kids from getting injured or suffering with a catastrophic school bus crash," said Harris.His friends are not surprised."He cares more about you than himself. He's always been that way," Harris said.Cavanaugh has been a fire fighter here since 1977. Now the fire station is full of flowers from friends and family. All are remembering a brave and dedicated rescue worker, whose final act was saving so many lives."I think if anyone ever mentions Kenny Cavanaugh’s name, hero out to be right there with it," Wernli said.Harris added, "He’s definitely a hero."Watch the video above to learn more about this story.