A section of Perth Road 170, west of Mitchell was closed all night because of a large structure fire.
The OPP closed the road, south of Highway 8, around 7:00 p.m. Sunday to allow fire crews quicker access to the site.
Firefighters from West Perth were on the scene initially, and called for assistance from stations in Seaforth, Monkton and Sebringville.
The OPP re-opened Road 170 just before 5:00 a.m. Monday.
There's no word yet on the extent of damage from that fire near Mitchell.