Highway 105 near Patrick Street in Chelsea, Que., is closed in both directions after a landslide sunk part of the road towards the Gatineau river on Tuesday.
On Wednesday, officials expect more land to slide as temperatures warm up.
"Right now, because the ice is starting to melt in the ditches, they do expect that there will be more land that will just slide," Chelsea Mayor Carly Green told reporters Wednesday morning. "Over the evening, through the course of the night there was no movement, but now as things are warming up there will be more water in the ditches and running down into the ravine.
"Most of all we're working with the ambulance service, fire, all the police because there is no way around this except autoroute 5. So we want to ensure the safety of all our residents," Green said.
Work crews taped off the road just north of the bridge connecting Saint Joseph Boulevard in the Hull sector of Gatineau to Saint Louis Street on the other side of the river.
Two nearby residences have so far not been evacuated.
Traffic is closed in both directions. Transport Quebec did not say how long the road will be closed.
Quebec transport ministry workers have set up a camera to track soil movement at this washout on 105/Chelsea pic.twitter.com/uw8xjURg5E— Stu Mills (@StuMillsCBC) April 9, 2014