Update at 2:45 p.m.:
OPP have confirmed that County Road 25 between Marnoch Line and Hoover Line is now open.
Update at 2:20 p.m.:
Three fire fighters had to be treated for exhaustion while battling a fire at an auto body shop west of Blyth.
North Huron Fire Chief Marty Bedard says the fire fighters were treated at the scene and the warm weather was factor.
The fire broke out before 10:00 a.m. and closed County Road 25 from Marnoch Line and Hoover Line.
Bedard says the fire is now under control and County Road 25 should be re-opening within the hour.
Original story 11:02 a.m.:
A section of County Road 25 between Marnoch Line and Hoover Line between Auburn and Blyth remains closed due to a structure fire.
Ontario Provincial Police tell CKNX there are no injuries.
Officers and firefighters are concerned about propane tanks that were located close to the fire.
Emergency road closure signs have been erected. Officers are asking the public to avoid the area.
**With files from Kate Stockmann