Road sections 17, 592 and 537 are closed due to spring flooding due to heavy rains and rapid snowmelt. On Sunday, Highway 17 was closed about 20 kilometers to the west near Mattawa.
The water overflowed its bed and invaded Highway 17 between Deep River and Stonecliffe.
This section of the road is closed in both directions since 7:15 am Monday.
Motorists will have to take a detour on Routes 11 and 60, says the Ontario Provincial Police.
The North Bay-Mattawa Conservation Authority issued a flood warning for the area last week when heavy rains were coming.
It will also avoid the route 592 near the community of Novar, who is also a victim of the flood waters.
In the Greater Sudbury area, Highway 537 is closed in both directions between Cross Road and Saint-Cloud Road.
Environment Canada issued heavy rain warnings for the Chapleau, Elliot Lake and Sault Ste. Marie areas, among others.
A freezing rain warning is also in effect for the Timmins and Cochrane area.
Surfaces, such as roads, streets, sidewalks and parking lots, could become icy and slippery.