Emergency Management Ontario says it is not an imminent emergency evacuation but rather, a precautionary one based on water levels, ice flow and snow pack conditions.
EMO says Moosonee's mayor has requested the evacuation of about 246 people. The Ministry of Natural Resources arranged two flights on Friday for approximately 72 residents. The rest are to leave the community about 20 kilometres from James Bay on Saturday.
Most of the evacuees were sent to Sudbury, where the city’s emergency management staff and partners have arranged for accommodations in a local motel.
EMO said some Moosonee residents were self-evacuating, leaving on Friday afternoon's train from Moosonee.
The community of about 3,500 residents isn't connected to the road system, meaning all travelers must arrive or depart by train or plane.
A recent low pressure system has been hanging over northern Ontario for most of the week, delivering over 10 cm of snow in some regions and freezing rain.
An ice jam on the Moose River is causing concern for officials, putting the town of Moose Factory on alert.
Conditions will not be helped by a further 20 mm of rain that could fall from Geraldton to Moosonee on Sunday, ice pellets and freezing rain is also possible.