Emergency crews were called to a fatal accident in Buena Vista County, Iowa on Tuesday.
It happened about three miles east of Newell on Highway seven.
Sheriff's officials say about 9:20 a.m., a car driven by 24-year-old Jonathon Ohrtman of Newell, Iowa crossed the center line and collided head on with a semi-truck.
Ohrtman was pronounced dead at the scene.
Authorities say the semi-truck driver, 32-year-old Robert Bainbridge of Albert City, was hurt and taken by car to a medical facility.
While responding to the crash, authorities say the heat became a problem for them.
Several of the firefighters were treated for heat exhaustion including one Newell firefighter who was taken to the hospital for treatment.
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