Traffic was snarled in Petersburg on Tuesday morning after two hay wagons came loose from the tractor pulling them and smashed into a hydro pole.

The crash brought down live power lines along Notre Dame Drive near Snyder’s Road in the small community west of Kitchener.

The lines then came into contact with nearby trees, igniting a fire.

Fire crews were called in to hose down the roof of a house to keep the flames at bay, but they were forced to stand by and let the trees burn until the power could be turned off.

Police say the wagons also nearly hit a gas meter on the house, but there were no injuries.

Crews spent more than three hours making repairs to the lines. Damage is estimated at more than $12,000.

According to police, an inappropriate pin was used to attach the trailers. The 58-year-old woman from Wilmot Township who was driving the tractor has been charged with improper means of attachment.