At the Middletown, Ohio, fire department, calls for actual fires are rare. These days the station responds to more calls for drug overdoses — four to five a day on average.

Firefighter Bryan Oliver goes on a lot of these runs. Oliver and his team administer Naloxone and then perform CPR. He says they may treat the same patient for multiple overdoses, sometimes in the same day.

"Anybody you talk to who does this job will tell you it's frustrating and you put that to the side because you have a job to do," he says.

The vehicle combines a fire engine with pumping capabilities with a ladder truck, including a 107-foot aerial ladder enabling firefighters to access the new taller buildings to be built on the nearby Facebook campus and other parts of Menlo Park.

Black River First Assistant Fire Chief Leslie R. Williams said firefighters were investigating a crash between a van and a truck when a passing motorist saw smoke coming out of their fire truck. Firefighters extinguished the minor electrical fire within minutes, Mr. Williams said.

Mr. Williams said he believes the fire was caused when a door switch failed. Fort Drum firefighters drove to the scene in case the fire was larger, he said.

“We just put it out with a fire extinguisher,” he said. “It’s actually back in service.”

More than 500 firefighters already have arrived to fight the nearly 20,000-acre fire burning southeast of Prescott Valley in Arizona. Roughly 1,400 residents of the nearby town of Mayer were forced to evacuate Tuesday, according to Arizona news reports. The human-caused fire started Saturday and has destroyed nine homes.

Twenty firefighters make up Grand Junction’s wildland firefighting team, so local officials are comfortable sending four firefighters to help, Evans said.