7 Signs Your Tree Is Dangerous
A failing tree usually warns you first. Learn the seven signs that mean it’s time to call a certified arborist — before the tree decides for you.
1–2: Dead wood and a thinning canopy
Large dead branches, or a canopy that’s noticeably bare or thinning while neighbouring trees are full, signal decline. Dead limbs can drop without warning.
3–4: Leaning and root problems
A new or worsening lean — especially with soil heaving or cracking on one side — is a serious red flag. So are mushrooms or fungus at the base, which often indicate root rot you can’t see.
5–6: Trunk cracks and cavities
Vertical cracks, deep cavities, or large areas of missing or peeling bark mean the trunk’s structural integrity may be compromised. Co-dominant trunks with a tight V-fork are prone to splitting.
7: Limbs over the house
Even a healthy tree becomes a hazard when heavy limbs hang over the roof, the driveway, or where people gather. Clearance pruning or reduction reduces that risk.
What to do next
If you see any of these, don’t wait for a storm. A certified arborist can assess whether the tree needs pruning, support, or removal — and how urgent it is.
Key Takeaways
- Dead limbs and a thinning canopy signal decline
- A new lean or heaving roots is an urgent red flag
- Trunk cracks, cavities, and fungus mean hidden weakness
- Limbs over the house are a hazard even on a healthy tree
Related
Spotted a warning sign?
Get a free certified assessment before the next storm.
Questions Homeowners Ask Us
My tree leans — is it going to fall?
A long-standing slight lean is often fine; a new or worsening lean with root or soil movement is dangerous. Have it assessed promptly.
Are mushrooms on my tree bad?
Often yes — fungus at the base or on the trunk can indicate internal decay or root rot, which weakens the tree. It’s worth an inspection.
How urgent is it?
It depends on the sign and what’s below the tree. We assess and tell you honestly whether it’s monitor, prune, or remove now.