How to Spot a Dangerous Tree Before It Falls

In the heavily forested regions of Northern Wisconsin, trees are a treasured part of the natural landscape. However, not all trees are structurally sound, and a single falling tree can cause significant damage to homes, vehicles, power lines—or worse, result in personal injury. Spotting the signs of a dangerous tree before it falls is essential for both safety and property protection. Whether caused by age, disease, storms, or improper growth, unstable trees can often be identified with a careful visual inspection. Recognizing these red flags early gives you time to call a professional before the tree becomes a hazard. Below are the key warning signs that a tree may be at risk of falling.

A tree that is leaning more than it should or growing at an unusual angle may indicate root instability or soil erosion beneath the base. While some trees naturally grow at a slant, sudden or increasing lean—especially following a storm or heavy snowfall—is a serious concern. Trees leaning toward structures or high-traffic areas should be assessed immediately by a certified arborist.

Vertical or horizontal cracks in a tree’s trunk or major limbs can be signs of internal decay or structural stress. These cracks often occur where the trunk forks or branches out, creating a weak point that’s prone to splitting. If left unaddressed, this type of damage can lead to a complete failure during strong winds or storms, posing a significant safety risk.

Large dead branches or hanging limbs are not just unsightly—they’re dangerous. These limbs are more likely to snap and fall without warning, especially during high winds or heavy snow. Dead wood also signals that parts of the tree are no longer receiving nutrients, which may point to disease or decay deeper within the tree’s structure.

Mushrooms growing at the base of a tree or visible decay on the trunk may indicate internal rot. Additionally, soft, spongy soil around the roots or exposed root damage may point to compromised anchoring. Since root systems support the entire tree, any damage below ground can severely affect the tree’s stability and increase the likelihood of it toppling.