A dying or dangerous tree almost always shows warning signs before it fails: large dead branches, mushrooms or fungus at the base, a sudden lean, deep trunk cracks, peeling bark, and soil heaving up around the roots. You can spot every one of these from the ground without any tools or risk. If you find several — especially fungus at the base or a fresh lean — the tree may be structurally unsound and should be assessed by an arborist before a Houston storm brings it down on your house. This guide walks you through what to look for.
Watch how it's done
Video: Leaf & Limb. Shown for reference — not affiliated with GetHoustonLeads.
What you'll need
- Your eyes and a slow walk around the tree
- A flashlight for the trunk base
- Binoculars for the upper canopy
- A phone camera to document what you find
Recommended parts & supplies
- Binoculars — inspect the high canopy without climbing
- Rubber mallet — tap the trunk to listen for hollow spots
- Work gloves — if you probe soft bark or fungus
- Moisture meter — check drought stress in Houston clay
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Step by step
- 1
Look for large dead branches in the canopy
Stand back and scan the crown. Bare limbs with no leaves during the growing season — especially thick ones — are dead wood that can drop without warning. A few small twigs are normal, but big dead branches (arborists call them widow-makers) are a real hazard, particularly the ones hanging over a roof, driveway, or play area.
- 2
Check the base for mushrooms and fungus
Kneel at the trunk base and roots. Shelf-like fungus (conks), clusters of mushrooms, or a soft, punky texture in the wood are signs of internal rot. Root and butt rot is one of the most serious problems a tree can have because it silently weakens the very base that holds it up — a tree can look full and green on top while its foundation is failing.
- 3
Judge whether the tree is leaning — and if it is new
A tree that has always leaned a little is usually fine. A sudden new lean is an emergency sign — it can mean the roots are tearing loose. Look for soil cracking or lifting on the side opposite the lean. After heavy Houston rains soften our clay soil, a top-heavy oak or pine can start to tip; if you notice a fresh lean, keep people away and call a pro fast.
- 4
Inspect the trunk for cracks and cavities
Walk a full circle around the trunk. Deep vertical cracks, seams, or open cavities weaken the trunk and are entry points for decay. Tap suspect areas with a rubber mallet — a hollow drum sound instead of a solid thud suggests the wood inside is rotted out. Two cracks on opposite sides are especially concerning.
- 5
Look for bark loss and dead patches
Areas where bark is missing, peeling, or falling away can mean that section of the tree is dead underneath. A vertical strip of dead bark and no growth (a canker) running down the trunk points to disease. In Houston, watch oaks for signs of oak wilt — rapid leaf browning and canopy thinning that spreads through connected root systems and can kill a tree in a single season.
- 6
Check the roots and soil for heaving
Examine the ground within a few feet of the trunk. Soil that is mounded, cracked, or lifting — or roots that look raised out of the ground — signals that the root plate is moving. This is a serious stability warning. Also note any major roots that have been cut by recent construction or trenching, which can undermine a tree years before it finally falls.
- 7
Document everything and get an assessment
Photograph anything you find and note the date. If you counted one minor sign, keep an eye on it. If you found several — or any single serious one like base fungus, a new lean, or root heave — have a certified arborist evaluate the tree. Catching a hazard tree before storm season is far cheaper than the damage and cleanup after it drops on your home.
When to call a pro
Have a certified arborist assess any tree showing base fungus, a fresh lean, root heave, deep trunk cracks, or large dead limbs over a target — these are the trees that fail in Houston’s storms and hurricanes. Diagnosing internal decay and deciding whether a tree can be saved or must come down takes trained judgment and, sometimes, sounding equipment. Removal of a large or compromised tree is never a DIY job: the wood is heavy, unpredictable, and often near structures or lines. An arborist can also tell you if it is oak wilt, which needs specific handling to protect your neighbors' oaks.
Get a free quote from a local pro
No obligation — a licensed, insured local Houston partner will reach out. Available 24/7 for emergencies.
How to Tell If a Tree Is Dying or Dangerous — FAQ
What are the signs a tree is dying?
Is a leaning tree dangerous?
Do mushrooms at the base of a tree mean it is rotting?
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