Crews responded to the fire at a three-story, two-row family house at 119 Sudbury Road around 9 p.m. on Sunday, July 24, the Concord Fire Department said.
Upon arrival, firefighters saw heavy flames coming from the back porch on the second floor. The fire completely spread throughout the inside of the second and third floor as well.
The fire was knocked down around 10:25 p.m., the department said. All residents were able to get out safely and none were injured. However, a firefighter was taken to a local hospital for suspected heat exhaustion.
The cause of the fire is under investigation.
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