They think a space heater had a hand in a fire at a mobile home in Gravenhurst. Fire crews got the call to the Four Seasons Trailer Park on Baseline Road just before 3:00 yesterday afternoon. About 20 firefighters were called on to battle the blaze, arriving to find the mobile home fully engulfed. Two dogs were lost in the fire, while a family of four weren’t there at the time of the fire. Damage is estimated to be $45,000.