Tree Safety 101: Recognizing Hazard Trees Before They Become a Problem

In Southern Alberta, trees face a unique set of challenges. High winds, sudden temperature swings, dry summers, and heavy snow loads all put stress on trees year round. In places like Lethbridge, where wind is a constant factor, a tree that looks fine one season can quickly become a safety risk the next.

Understanding how to spot a hazardous tree early can help prevent property damage, power outages, and personal injury. Below are some of the most common warning signs homeowners should watch for in our region.

Why Tree Safety Matters in Southern Alberta

Trees add beauty and value to your property, but when they become unstable or unhealthy, they can turn into serious hazards. Strong chinook winds and seasonal windstorms in Lethbridge regularly expose weak limbs, compromised root systems, and structural defects that may not be obvious at first glance.

Proactive inspections and maintenance are key to keeping trees safe, especially in high wind areas.

Common Signs of a Hazardous Tree

1. Dead or Dying Branches

Dead limbs are one of the most common hazards we see in Southern Alberta.

Warning signs include:

• Branches with no leaves during the growing season

• Brittle wood that snaps easily

• Hanging or partially broken limbs after windstorms

These branches can fall without warning, especially during high winds.

2. Leaning Trees or Shifting Soil

A tree that suddenly starts leaning is a major red flag.

Watch for:

• Soil lifting or cracking near the base

• Exposed or damaged roots

• A lean that has recently increased

In windy areas like Lethbridge, compromised root systems often fail during storms.

3. Cracks in the Trunk or Major Limbs

Vertical cracks or splits in the trunk can indicate structural failure.

This is especially concerning when:

• The crack extends deep into the trunk

• It worsens after wind or freeze-thaw cycles

• The tree has multiple stems splitting from a weak union

These trees are at high risk of breaking apart under wind stress.

4. Fungal Growth at the Base or on the Trunk

Fungi often signal internal decay, even if the tree still has healthy foliage.

In Southern Alberta, watch for:

• Mushrooms or conks growing at the base

• Soft, spongy wood near the trunk

• Areas that appear hollow or rotten

Internal decay weakens a tree’s ability to withstand wind and snow loads.

5. Pest and Disease Issues Common to Our Region

While Southern Alberta does not experience every tree disease found elsewhere, several issues are common here.

Some examples include:

• Canker diseases affecting poplar and willow trees

• Fire blight impacting ornamental fruit trees

• Bronze leaf disease in poplars

• Stress related dieback caused by drought or soil compaction

Diseased trees are more likely to fail structurally, particularly during wind events.

6. Trees Too Close to Structures or Power Lines

Even healthy trees can become hazards when they grow too close to homes, fences, or overhead lines.

Risks include:

• Branches rubbing against roofs or siding

• Limbs contacting power lines during windstorms

• Trees growing into service corridors

This is especially important in high wind areas, where branches can whip or snap unexpectedly.

Why Wind Makes These Risks Worse in Lethbridge

Lethbridge is known for some of the strongest and most consistent winds in Alberta. Wind puts repeated stress on weak branches, damaged trunks, and shallow root systems.

Over time, this constant movement:

• Worsens existing cracks

• Loosens soil around roots

• Causes branch fatigue and failure

Regular inspections help catch problems before wind exposes them the hard way.

When to Call a Professional Arborist

If you notice any of the warning signs above, it is best to have a qualified arborist assess the tree. Professional evaluations help determine whether pruning, structural support, or removal is the safest option.

A proactive approach can:

• Reduce emergency situations

• Protect your home and property

• Improve long term tree health and safety

Protect Your Property With Preventative Tree Care

Hazard trees rarely fail without warning. By understanding what to look for and acting early, homeowners in Southern Alberta can avoid costly damage and dangerous situations.

If you are concerned about the safety of a tree on your property, scheduling a professional assessment with Hi-Rigger Tree Service is the safest next step.