Firefighters respond to grass fire in Great Falls MTN and last updated 2021-07-04 11:45:55-04 (UPDATE, 11:30 p.m.) The fire is under control; no injuries reported, no structures damaged. (1st REPORT, 10:54 p.m.) Firefighters are at the scene of a grass fire in Great Falls. As of 10:45 p.m. on Saturday, the fire had burned about 15 acres. The fire is in the vicinity of 22nd Avenue South and 18th Street. At this point, there are no reports of any injuries or damaged structures, and no word on the cause of the fire. Great Falls Fire Rescue asks that people avoid the area to allow crews to work safely, and reminded people to "be extra careful with fireworks in these hot and dry conditions."