Broken, damaged limbs--particularly large limbs--pose an immediate danger to people and property beneath, the moment they appear. Split crotches can be repaired, but an arborist may need to evaluate and perform the repairs. Damaged areas are in danger of invasion by insects and disease, which can further weaken portions of the tree, increasing the danger.
About this Author
Alice Moon is a freelance writer with more than 10 years' experience. She was chosen as a Smithsonian Institute intern, working for the National Zoo in Washington, D.C., and has traveled throughout Asia. Moon holds a Bachelor of Science in political science from Ball State University.