Spent 35 years in the electric utility industry and went through many icing events. Ice storms are the worst. The effects in many cases are system wide. It’s nearly impossible to provide proper overhead line clearance in an urban or remote rural environment. In addition if the ice accumulation is significant enough the weight of the ice along can exceed the carrying capacity of the line or other fixtures.
Where I live all power lines are underground.
Yep...just look what it’s (ice load) done to all of these huge Live Oak branches, in Texas.