Firefighters quickly put out three grass fires on Saturday afternoon.
The fires happened around noon, on Lockwood Road between Exxon Road and Reynolds Street.
Crews put out the fires within about 10 minutes of arriving, according to acting Captain Kevin Sparrow.
No structures were threatened.
Two Montana Rail Link communication poles were burned.
Sparrow said there is no official cause, but a train may have put off sparks to start the fire.