About 30 residents have been forced from their homes after a two-alarm fire in Calgary's southeast ignited early Tuesday morning.

Crews responded to the fire at a home under construction in the 1100 block of Bellevue Avenue around 2:50 a.m. MT.

Additional crews were also dispatched because of the flames showing from a distance as first responders were en route.

Local resident Dave Hines said he heard a series of explosions early in the morning that woke him up. 

By the time the fire was brought under control it had spread to nearby homes — destroying two and badly damaging three.

1100 Bellevue Ave Calgary

"With the amount of homes that were involved in it, it takes a lot more effort," said Calgary Fire Department spokesman Jayson Doyscher. "Fire crews were able to do the best they could with the involved structures."

Calgary Transit buses were brought in to shelter the displaced residents.

The fire is out, but crews continued to douse hot spots with water until Tuesday afternoon.

There are no reports of injuries and the cause of the fire is still under investigation.