A residential fire in the northwest community of Hidden Valley is now under control

Calgary Fire Department spokesperson Carol Henke says multiple calls came in around 5 p.m. for a fire in the 10,000 block of Hidden Valley Drive.

Hidden Valley Fire

Fire crews at the scene called for a second alarm immediately due to the volume of smoke in the area. (Justin Pennell/CBC)

When fire crews got on scene, the chief immediately called for a second alarm because of the volume of smoke and the fire had already spread to neighbouring homes.

Jaron Whelan, 18, was in the garage with his dad when he heard a loud boom coming from one of the homes behind his house.

"I looked across the back alley and the whole rooftop was already up in flames," he said.

Whelan says he hopped the fence and started banging on doors to alert neighbours of the fire.

Four homes were affected by the fire. The home where it started suffered the most severe damage and the two homes to the east were significantly damaged.

Katie Gambeta's home was at the west edge of the fire. She was told only the exterior was damaged but she has not yet been allowed back inside her home.

"I've never been through anything like this before, it's probably the most terrifying experience that has ever happened," she said.

According to one witness at the scene, who is a relative of one of the residents whose home was destroyed, the fire started on the back deck of one home. The loud boom was the sound of the barbecue tanks exploding.

"They have nothing left, absolutely nothing," she said.

Henke says there were no injuries reported and once it is safe for the fire investigator to start digging through the scene, more answers will be available.