Top 5 Warning Signs Your Tree Might Be Dangerous – Calgary Homeowner's Guide

Calgary's unpredictable weather and extreme seasonal changes can be hard on even the healthiest trees. From chinook winds to heavy spring snowfalls, these conditions can weaken trees over time—making them more likely to cause property damage or personal injury if left unchecked.

At Gary's Stump and Tree Service, we often receive calls after a storm or wind event, but many tree failures show signs well in advance. Knowing what to watch for can help you prevent problems before they happen.

Here are the top 5 warning signs that your tree might be dangerous and in need of professional attention.

1. Large Cracks in the Trunk or Major Branches

Visible splits or cracks—especially those that extend deep into the trunk or main limbs—are serious red flags. These often form after storm damage, freeze-thaw cycles, or old wounds that never properly healed. Cracks can compromise a tree's structure and stability, putting nearby buildings, fences, or power lines at risk.

If you've noticed cracking bark or open wounds on your tree, it may be time to schedule a tree removal service in Calgary before it becomes a hazard.

2. Leaning Suddenly or More Than 15 Degrees

A tree that's started leaning suddenly—especially after strong winds or melting snow—could have root damage or structural instability underground. A gradual lean that worsens over time may also be a sign the tree is shifting due to poor anchoring or internal decay.

In many cases, a professional arborist can evaluate whether bracing or tree pruning can correct the issue, or if full tree removal is the safest solution.

3. Fungus or Rot Around the Base

Fungal growth, mushrooms, or soft, spongy wood around the base of a tree can indicate internal rot. When decay sets in, the tree may look healthy on the outside but be completely hollow or weakened inside. This is particularly dangerous, as the tree may fall with little warning.

Our experienced crew can inspect for root rot, decay, and other structural issues, and perform safe stump grinding after removal to prevent regrowth and improve yard safety.

4. Dead or Hanging Branches Over Your Roof or Yard

Dead branches, also known as "widowmakers," are one of the most immediate threats to safety. These limbs can fall without warning, especially during strong winds or heavy snowfall. If dead branches are positioned above your home, driveway, or walkways, they should be removed as soon as possible.

We offer professional tree pruning services in Calgary to remove hazardous limbs and improve your tree's overall health and structure.

5. Root Damage or Soil Heaving

Look down—sometimes the danger starts below the surface. If you see large roots lifting out of the soil, or if the ground appears raised or cracked around the tree's base, it could indicate that the tree is shifting or unstable. Construction, trenching, and even repeated foot traffic can also damage roots and weaken a tree's hold in the ground.

In some cases, trees with root damage can be stabilized, but often they need to be removed before they fall. We specialize in tree removal for unsafe or unstable trees throughout the Calgary area.

Don't Wait for Storm Damage—Get a Professional Tree Inspection

If your tree is showing any of these warning signs, it's better to act early. What looks like a small issue now can turn into a costly problem after the next windstorm or snowfall.

At Gary's Stump and Tree Service, we provide fast, honest assessments and safe, insured work. Whether it's a one-time removal or ongoing tree care, we're here to help.

Let us keep your property safe, your trees healthy, and your yard looking its best—year-round.