Tree risk warning signs rarely show up out of nowhere. In most cases, a hazardous tree gives you visible clues long before a branch fails or the tree itself comes down. You just need to know what to look for.
Catching those signs early can help you protect your home, avoid a costly emergency, and in many cases save the tree itself.
At Pro Tree, our ISA Certified Arborists inspect trees across Excelsior, Minnetonka, Wayzata, Eden Prairie, and the rest of the West Metro every day. While every tree and every yard is different, these are the five signs that tell us a tree deserves a closer look, plus what to do about each one.
1. Deep Cracks or Splits in the Trunk
A vertical crack running along the trunk, especially one that reaches toward the base, is one of the clearest signs of structural damage in a tree.
Not every crack means removal is necessary. Some are surface level, while others compromise the tree’s structural integrity, and telling the difference takes a trained eye.
If a crack appeared after a windstorm or seems to be growing, have an ISA Certified Arborist evaluate it as soon as possible. Catching the problem early usually means more options than waiting until the damage gets worse.
2. A Tree That’s Suddenly Leaning
Plenty of trees grow at a slight angle and stay perfectly stable for decades. What concerns arborists is a new lean, or one that becomes noticeably more pronounced over time.
A sudden lean after heavy rain or strong wind can mean the root system has shifted, which reduces the tree’s stability. If the tree stands near your home, driveway, patio, or another high traffic area, schedule an inspection promptly.
Comparing recent photos to older ones often reveals subtle changes that are easy to miss day to day. An early inspection can confirm whether the tree can be stabilized with proper care, or whether a bigger issue needs attention.
3. Mushrooms or Decay Around the Base
Mushrooms growing near a tree’s base, or bark that feels soft and spongy, can point to internal decay.
Not all fungi cause harm. Many simply grow on dead wood and pose little concern. Certain fungi on a living tree, though, can signal that decay is affecting its structural strength.
Because different fungi carry different implications, this is one area where a professional opinion matters most. An arborist can identify what you’re seeing, determine whether it affects the tree’s stability, and recommend the right next step.
4. Large Dead Branches in the Upper Canopy
One dead branch usually isn’t cause for alarm. Multiple large dead limbs throughout the canopy, however, often point to a tree under stress from disease, insects, drought, or root damage.
Dead branches grow brittle over time and are far more likely to break during high wind or heavy snow, creating a hazard for people, vehicles, and nearby structures.
Routine tree health care and pruning removes these hazardous limbs before they become a problem, while also improving the tree’s overall health and structure.
5. Storm Damage That Hasn’t Been Assessed
A tree can look fine after a storm and still hide real damage. That is exactly the kind of tree risk warning sign that is easy to miss.
Strong wind can weaken branch attachments, crack major limbs, or disturb the root system in ways you cannot see from the ground. A tree that looks healthy today could become a serious problem in the next storm.
The joint Minnesota DNR and USDA Forest Service guide to hazardous tree defects points to storm damaged wood and weakened branch unions as some of the most common warning signs that come before a tree fails. If your property has been through severe weather recently, a professional inspection is one of the best ways to catch hidden hazards before they turn into emergencies.
Tree Risk Warning Signs at a Glance
| Warning Sign | What It Could Mean | Recommended Next Step |
| Deep trunk crack or split | Structural weakness | Schedule a professional inspection as soon as possible |
| Tree developing a new lean | Possible root instability | Have an arborist inspect it promptly |
| Mushrooms or soft wood at the base | Potential internal decay | Professional evaluation to determine severity |
| Multiple large dead branches | Tree stress or declining health | Schedule pruning and a health assessment |
| Unassessed storm damage | Hidden structural defects | Post storm arborist inspection |
How Often Should Trees Be Inspected for Risk?
A quick walk around your property after any major storm is one of the easiest habits for catching problems early.
Even when everything looks healthy, most mature trees benefit from a professional inspection every two to three years. Regular checkups let an arborist catch developing issues before they turn into expensive repairs or safety concerns.
For properties with mature trees, preventive care almost always costs less than responding to storm damage or an emergency tree removal.
When Should You Call an Arborist?
Trust your instincts if something about one of your trees does not look right.
A new crack. A lean that was not there before. Dead branches where there were not any last season. Mushrooms suddenly growing at the base.
None of these changes automatically means a tree has to come down. In many cases, early intervention through pruning, structural support, or ongoing tree care preserves the tree and lowers future risk.
At Pro Tree, we always recommend the least invasive option that protects your property and your tree’s long term health. If removal turns out to be necessary, we will explain exactly why. If the tree can be saved safely, we will help you do that.
Protect Your Home From Tree Risk Before the Next Storm
The best time to identify a hazardous tree is before it becomes an emergency.
If you have noticed any of these warning signs, or you simply want peace of mind, schedule a free tree risk assessment with one of Pro Tree’s ISA Certified Arborists. We will evaluate your trees, explain exactly what we are seeing, and give you honest recommendations so you can make the right call for your property.
Because when it comes to tree care, catching a problem early is often the best way to protect your home and the trees that make it beautiful.
Schedule your free tree risk assessment with Pro Tree today.
