Rocky View County officials said that it appears the initial cause of a massive grass fire, which is now under control, was a downed power line. Officials said strong wind gusts of up to 70 kilometres per hour contributed to the fire spreading over approximately 350 acres.

The fire started before noon, Northwest of Airdrie, near Township Road 280 and Range Road 23. 

In a final update on the grass fire situation late Tuesday afternoon, Rocky View County officials said that the emergency response has been concluded.

Officials said that those who had previously been evacuated can expect instructions on re-entry by 7 p.m. and that roads that were previously closed will also re-open a 6 p.m. Power is also estimated to be restored by 7 p.m.

The massive grass fire that started before noon on Tuesday Northwest of Airdrie near Township Road 280 and Range Road 23. Officials believe the fire was the result of a downed powerline and that gusting winds spread the fire up over approximately 350 acres.

County officials said that there were no, 'significant losses' and extended thanks to residents for their quick actions. 

"Our dedicated emergency teams, including local fire crews and mutual aid partners, worked tirelessly to bring the situation under control and support those affected," officials said

Fire crews from seven Rocky View County Stations, with additional support from the Town of Crossfield, Mountain View County, the City of Airdrie, and the Municipal District of Big Horn also responded to the fire.