A state of emergency is still in effect in a community just east of Windsor, after a massive fire broke out overnight at a vegetable processing plant.
Fire officials say a small ammonia leak has been detected at the Bonduelle plant in the town of Tecumseh.
The town has now lifted the evacuation order for residents living within 1.5 kilometres of the facility, affecting about 1,300 homes.
Emergency Management Ontario issued a red alert, saying the fire is still burning and that hazardous materials are involved.
Others in the area outside the evacuation zone were being asked to stay sheltered and in place, and to keep their windows closed.
Tecumseh Mayor Gary McNamara says residents are being offered shelter at the town's arena and a nearby school. There are no
immediate reports of injuries.
The building, formerly a Green Giant plant, was purchased by Bonduelle in 2007.