Can Heavy Rain Make Trees More Likely to Fall?

Heavy rain can make unstable trees far more dangerous, especially when the ground becomes soft and saturated.

After a long dry spell, a burst of heavy rain can feel like a relief. But for trees, sudden wet weather can create new risks. Saturated soil, weakened roots, strong winds and shifting ground can all make trees more likely to lean, drop branches or fall.

At Harvey Tree Care, we often receive calls after heavy rain from property owners across Harvey, Yarloop, Benger, Brunswick, Waroona, Burekup and nearby areas who are worried about leaning trees, cracked soil, fallen limbs or trees that suddenly look unstable.

Here’s why heavy rain can increase the risk of tree failure and when it is time to call Harvey Tree Care for advice.

How Heavy Rain Affects Tree Stability

Trees rely on their root systems to anchor them in the ground. When soil is firm, roots have the support they need to hold the tree upright. But when rain soaks deep into the soil, that support can weaken.

Saturated soil can become soft, loose and heavy. This means the roots may not grip as firmly, especially if the tree is large, leaning, shallow-rooted or already stressed.

A tree may become more likely to fall when:

• The ground is waterlogged
• Roots are shallow or damaged
• The tree has a heavy canopy
• Wind follows heavy rain
• The tree is already leaning
• Soil has washed away around the base
• The tree is growing on a slope or bank

Heavy rain does not always cause a healthy tree to fall, but it can expose problems that were already there.

Saturated Soil Can Weaken Root Support

Roots do more than feed the tree. They hold it in place. When the soil around those roots becomes saturated, the tree can lose some of that support.

This is especially risky for trees growing in:

• Sandy or loose soil
• Clay soil that becomes slippery when wet
• Sloped blocks
• Low-lying wet areas
• Drainage paths
• Areas affected by erosion
• Properties with recent digging or construction nearby

If the soil around a tree starts lifting, cracking or moving after rain, it may be a warning sign that the root plate is shifting.

Heavy Rain Often Comes With Wind

Rain alone can create problems, but the risk increases when strong winds arrive at the same time. Wind places pressure on the canopy, while wet soil reduces the support below ground. That combination can be dangerous.

A dense canopy can catch wind like a sail. If the tree is already weakened by saturated soil, decay or root damage, strong gusts may cause it to lean further or fail completely.

This is why regular tree pruning services matter before storm season. Reducing heavy limbs, removing deadwood and thinning dense canopies can help reduce the pressure placed on the tree during bad weather.

Signs a Tree May Be Unstable After Heavy Rain

After a period of heavy rain, it is worth checking trees around your home, sheds, driveway, fences and access tracks.

Look for warning signs such as:

• A tree leaning more than usual
• Soil lifting around the base
• Cracks forming in the ground
• Exposed roots
• Roots pulling out of the soil
• Water pooling around the trunk
• Fresh cracks in the trunk
• Branches dropping suddenly
• Fungal growth near the base
• A hollow or unstable-looking trunk

If you notice any of these signs, avoid standing or parking near the tree until it has been assessed.

Why Leaning Trees After Rain Should Be Taken Seriously

Some trees naturally grow with a lean and may remain stable for years. But a new lean, or a lean that becomes worse after rain, can indicate root movement or soil failure.

This is particularly concerning when the tree is leaning towards:

• A house
• A shed
• A driveway
• A fence
• A neighbour’s property
• A road or access track
• Powerlines
• Play areas or outdoor spaces

A leaning tree does not always need to be removed, but it should be inspected by qualified arborists. In some cases, pruning can reduce weight and risk. In others, a professional tree removal service may be the safest option.

Root Damage Makes Wet Weather More Dangerous

Trees with damaged roots are much more vulnerable during heavy rain. Root damage can happen for many reasons, including:

• Excavation near the tree
• Driveway or shed construction
• Soil compaction from vehicles
• Drainage changes
• Previous storm movement
• Fungal decay
• Invasive pests
• Root cutting or trenching

If roots have already been weakened, saturated soil can make the tree unstable faster. A tree may look healthy above ground but still have serious problems below the surface.

Can Heavy Rain Cause Branches to Fall?

Yes. Heavy rain can add weight to branches, especially if the canopy is dense. Water-soaked foliage, combined with wind, can place extra strain on weak limbs.

Branches are more likely to fail if they are:

• Dead or decayed
• Cracked or split
• Overextended
• Poorly attached
• Covered in dense foliage
• Already weakened by pests or disease

Tree pruning can reduce this risk by removing dangerous limbs before they come down unexpectedly.

When Emergency Tree Removal May Be Needed

Emergency tree removal may be required if a tree has already fallen, is leaning dangerously, or is at immediate risk of collapse.

Call for urgent help if:

• A tree has fallen on a house, shed, fence or vehicle
• A tree is blocking a driveway or access track
• A tree is leaning heavily after rain
• Large roots have lifted out of the ground
• Cracks have appeared around the base
• Heavy limbs are hanging dangerously
• The tree is close to powerlines

If powerlines are involved, stay well clear and contact the relevant electricity provider or emergency services first.

Why Inspections Matter After Wet Weather

After heavy rain, a tree inspection can identify risks before they become urgent. Professional arborists can assess the canopy, trunk, roots and surrounding soil to determine whether the tree is stable.

An inspection can help determine whether the tree needs:

• Monitoring
• Weight reduction pruning
• Deadwood removal
• Canopy thinning
• Root assessment
• Stump or root management
• Full tree removal

This gives you a clear plan instead of guessing from the ground.

How to Reduce the Risk Before the Next Storm

The best time to manage tree risk is before severe weather arrives. Preventative tree care can make a big difference to how trees handle rain and wind.

Useful steps include:

• Prune heavy or overextended branches
• Remove deadwood
• Thin dense canopies
• Check trees near structures
• Improve drainage where possible
• Avoid compacting soil around roots
• Remove dead or unstable trees
• Book regular inspections for large trees

A little preparation can prevent property damage, blocked access and expensive emergency call-outs later.

Frequently Asked Questions

Can a healthy tree fall after heavy rain?
It can happen, but it is more common when there are existing issues such as weak roots, saturated soil, heavy canopy weight or internal decay.

Should I worry if my tree leans after rain?
A new or worsening lean should always be checked. It may indicate root movement or unstable soil.

Can pruning help stop a tree from falling?
Pruning can reduce canopy weight and wind pressure, but it cannot fix major root failure or severe structural weakness.

Who should I call if a tree looks unstable after rain?
Call an arborist for an inspection. If the tree has fallen or poses immediate danger, emergency tree removal may be required.

Local Arborists for Storm and Rain-Damaged Trees

Heavy rain can quickly reveal hidden tree problems. If a tree is leaning, moving, dropping branches or sitting in saturated soil, it is best to get professional advice before the next storm makes it worse.

Harvey Tree Care provides professional tree removal services, emergency tree removal, tree pruning and arborist advice across Harvey, Yarloop, Benger, Brunswick, Waroona, Burekup and surrounding areas.

Contact Harvey Tree Care today for a free quote and expert advice on trees affected by heavy rain or storm conditions.