The Midland Highway at Conara has reopened to northbound traffic after a grass fire.
Emergency services have thanked motorists for their patience.
The Midland Highway is blocked while emergency services respond to a grass fire at Conara.
The fire was first reported at 6.40pm, with multiple tankers on scene.
The Midland Highway is blocked to northbound traffic as crews work to put out the blaze.
South bound traffic is moving slowly due to smoke and low visibility.
Motorists are asked to avoid the area, with significant delays to travel time.