The ambulance careened into a pole on Stillwater Road, near Fredon Road, in Stillwater.
The emergency vehicle was transporting a person pulled from the fire to a nearby landing zone for a medivac helicopter.
The 68-year-old victim was transferred from the crashed ambulance to another ambulance and taken to the hospital in unknown condition.
One person died in the fire, in a house on Potters Road, that broke out shortly after 4:30 a.m.
The cause of the fire is under investigation.
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