Telephone wires are already largely underground. What you see are power transmission lines. That's why the transformers are up there, too.
I can only imagine it would be rather hazardous to have power transmission lines buried underground, especially in a region prone to any kind of flooding or even heavy, ground-saturating rains.
I can only imagine it would be rather hazardous to have power transmission lines buried underground, especially in a region prone to any kind of flooding or even heavy, ground-saturating rains.