The cause of a Tuesday morning fire at a Walkerton home remains under investigation. It started in the garage of the residence at 2973 Redwood Road around 9:30 a.m. The family got out of the home safely, according to ABC 57, but three firefighters were treated for heat exhaustion. Lapaz-North Township Fire Chief Chris Oginsky tells the TV station they were treated with IV fluids and will be fine. Tanker trucks from multiple departments hauled water to the scene since there are not fire hydrants in the area. Oginsky says firefighters also had a tough time accessing the attic area to extinguish the flames.