As residents slept nearby, flames consumed a grassy field, off 200 Street late Tuesday night.
Township firefighters were called to the grass fire in the 8400 block of 200 Street, behind Gold's Gym, just before midnight.
"The flames were shooting 10 feet in the air and the fire spread 50 feet," said Township assistant fire chief Bruce Ferguson.
Three engines were brought out to knock down the flames, which were getting closer to the Pharmasave head office building.
But firefighters got the blaze under control well before that. Firefighters were on scene for around three hours putting out hot spots. Given the time of night, the fire was likely caused by a tossed cigarette or some other smoking material.
At 8 a.m. Wednesday, Township fire was called out again for a grass fire, this time in Derby Reach Regional Park.
A tree had caught fire, said Ferguson. Fire crews managed to put out the blaze in 45 minutes. Derby Reach campers are still only permitted to have propane fires. Township fire department has not given permission to lift the wood campfire ban, said Ferguson.