Step1 of 5
The tree will grow and, sooner or later, a branch will get too close to the medium-power line.
Step2 of 5
A branch will touch or fall onto the line, potentially causing an electric shock hazard and injuries. The branch could catch fire and cause damage. It could also cause a power outage, and that could lead to all kinds of problems.
Step3 of 5
Strong winds, wet snow or freezing rain can cause branches or even the entire tree to fall onto the power line, triggering an outage in the neighborhood and a shock hazard.
Step4 of 5
As a preventive measure, Hydro-Québec periodically prunes dangerous branches and the tree will lose its natural shape.