How to Tell If a Tree Is Going to Fall

A tree is at risk of falling when it shows a new or worsening lean, exposed or severed roots, large sections of deadwood, deep trunk cracks, fungus at the base, or a hollow or cavity-filled trunk. Any one of these signs on its own is worth a closer look, and Houston’s heavy rains and hurricane-season winds can turn a marginal tree into a real hazard quickly, so it’s worth knowing what to check.

Start With the Base of the Tree

Root Flare and Soil Condition

Walk around the base and look at where the trunk meets the ground, known as the root flare. Cracked or heaving soil around the base, roots that have pulled partially out of the ground, or a gap between the root flare and the soil on one side are strong indicators the root system is failing. This is especially relevant in Houston, where clay soil swells and shrinks with rainfall and can loosen root anchoring over time.

Fungus, Mushrooms, or Conks

Fungal growth at the base or on visible roots typically feeds on decaying wood, meaning the structural wood supporting the tree may already be compromised even if the canopy still looks green.

Check the Trunk

Lean Direction and Severity

Every tree has some natural lean, but a lean that’s new, worsening, or paired with soil disturbance on the opposite side is a serious warning sign. A tree that leans further after each storm is losing its grip in the soil.

Cracks and Splits

Look for vertical cracks running up the trunk, especially ones that appear to open and close slightly as the tree sways in wind. These indicate the trunk’s structural wood is failing internally, not just cosmetically damaged.

Cavities and Hollow Areas

Tap gently on suspect areas, a hollow-sounding thud can suggest a cavity beneath the bark. A hollow trunk isn’t always an automatic removal, but it does mean less structural wood is supporting the tree’s full weight.

Look Up at the Canopy

• Large dead limbs: branches with no leaves during the growing season or brittle, peeling bark can break free without warning
• Uneven canopy: a crown that’s noticeably heavier or fuller on one side adds uneven wind load and stress to the root system
• Hanging or broken branches: limbs that are cracked but still attached, sometimes called hangers, are especially dangerous since they can drop at any time
• Widespread dieback: significant sections of thin, sparse, or dead foliage often point to a root or disease problem serious enough to affect stability

Situations That Raise the Risk Further

Certain conditions make an already weak tree more likely to fall. Recent heavy rain that has saturated the soil, high winds from a tropical system or strong frontal boundary, recent construction or trenching near the root zone, and a tree that’s notably taller than surrounding trees with no windbreak all increase the chances of failure. In Houston, the combination of clay soil and hurricane-season storms means trees with existing warning signs are most likely to come down during or right after a major weather event.

What to Do If You Spot Warning Signs

If a tree on your property shows one or more of these signs, keep people, pets, and vehicles clear of the area and avoid working near it yourself, since ground-level observations don’t always capture the full picture of what’s happening internally. A professional risk assessment can check root condition, trunk integrity, and canopy structure up close. We offer free estimates for tree risk assessments and provide 24/7 emergency response across the Houston area if a tree comes down or becomes unstable during a storm.

Before the Next Storm

• Walk your property after any period of heavy rain and note any new leaning or soil disturbance around large trees
• Have mature trees near your house, driveway, or fence line inspected before hurricane season each year
• Address deadwood and hangers promptly rather than waiting for the next storm to bring them down
• Keep a record of any trenching, grading, or construction work near tree root zones, since root damage isn’t always visible right away

Most trees that fall show at least one recognizable warning sign beforehand. Learning to spot leaning, root damage, deadwood, and trunk decay early gives you the chance to address the problem on your own schedule, rather than finding out the hard way during the next storm.

Frequently Asked Questions

Related articles