Signs a Tree May Be Dangerous

Some trees lean naturally and are stable. But a lean that's new, worsening, or accompanied by soil heaving at the base is a serious warning sign.

If the ground on the side opposite the lean is lifting, the root system may be failing.

Vertical cracks in the trunk or splits where major limbs attach indicate structural weakness. A tree with a cracked trunk is at real risk of failing, especially in wind.

Splits at branch unions — where two large limbs meet — are another common failure point.

Dead branches hanging in the canopy are the first to fall, and they can be surprisingly heavy. A canopy with a lot of deadwood needs attention, whether through pruning or removal.

Large hanging limbs caught in the tree — sometimes called 'widow makers' — are an immediate hazard.

Mushrooms or fungal growth near the base can indicate decay in the root system or lower trunk. Cavities and hollow areas weaken the tree's structure.

Construction damage to roots, soil compaction, or a raised root plate all suggest the tree's anchor is compromised.

If you notice these signs, keep people away from the area beneath the tree and request an evaluation. Don't wait for the next storm to address a tree that's clearly at risk.

The condition of the tree and surrounding property can help determine whether pruning, cabling, or removal is the appropriate response. See our hazardous tree removal page for more.