A grassy collection site for fall leaf bags and tree trimmings caught fire Sunday morning, spewing clouds of dense smoke over west Salt Lake City.

A city fire investigator spotted flames in the grass at the collection site, 1904 W. Indiana Ave. (850 South), at 11:15 a.m. and immediately summoned fire crews.Fanned by hot, dry winds, the fire soon spread over a three-square-block area. Capt. Devin Villa said a bulldozer operator on the scene helped firefighters cut a fire break around the burning grass and yard debris.

Although the fire was quickly contained, Villa said it was extremely taxing on firefighters because of the high temperatures and physical labor involved. No one was injured, and no structures were threatened by the fire, he said.

Firefighters were mainly concerned in extinguishing the fire quickly because of the impact the smoke was having on air quality, Villa said.

The Indiana Avenue fire was one of eight grass fires and two garage fires that kept Salt Lake firefighters busy Saturday night and Sunday morning. One of the garage fires, at 1452 S. 200 East, caused about $15,000 damage, Villa said. Causes of the fires are under investigation, but fireworks are suspected in most of them.