Fortunately, one can often read the clues which indicate that a tree is prone to failure. For instance, if a tree has large branches attached with tight, V-shaped forks, you should consider having those branches removed or lightened. Other warning signs of structural instability include cracks in the trunk or major limbs, hollow and decayed areas, or the presence of extensive dead wood. Mushrooms growing from the base of the tree or under its canopy may be a sign of root decay. On the other hand, just because you may not see fungus growth does not mean there is no decay.

It pays to be highly suspicious of any tree that has had construction activities such as trenching, addition or removal of soil, digging or heavy equipment movement anywhere under the spread of its branches. These activities can cause root death, which in turn could lead to the structural instability of the tree.

Even a healthy and otherwise safe tree can become hazardous if it is growing close to electric power lines. Someone who touches or climbs a tree while it’s resting on a live power line can be electrocuted. Any tree that has limbs within 10 feet of overhead lines should be considered hazardous, and should be left to the professionals.

If you suspect a hazard condition, it will pay to have your tree evaluated by a professional. You could be held responsible for any damage or personal injury caused by a tree on your property.