Hazardous Tree Warning Signs in Redding, CA

Why "it looks bad" and "it's hazardous" are different questions

Homeowners call about trees for two very different reasons, and the two get confused constantly. One is aesthetic — a tree looks thin, lopsided, or has a few dead branches. The other is structural — the tree, or a major part of it, is at real risk of failing. Trimming solves the first. Removal, often urgently, addresses the second. This page is about telling the two apart before you call anyone, using the same visual checks a tree professional starts with.

The seven-point walk-around

1. Check the base and root area. Mushrooms, shelf fungus, soft or crumbling wood, sawdust-like frass, or soil heaved up on one side of the trunk all point to root or trunk decay.

2. Check the trunk for cracks or splits. A vertical crack, a split at a point where two trunks or major limbs join (a "codominant" union), missing bark, or sap oozing from a wound. Any crack you can fit a finger into is active structural failure, not old damage.

3. Estimate how much of the canopy is dead. More than about a third dead, or an entire side of the canopy dead while the rest looks fine, points toward removal rather than pruning.

4. Check for a new lean. A lean the tree has always had is usually stable. A lean that appeared recently — especially paired with cracked or lifted soil on the side opposite the lean — is a root-plate failure in progress and needs same-day attention.

5. Look for included bark and weak unions. Where two large limbs or trunks meet at a narrow, V-shaped angle rather than a wide U, bark can get pinched between them (included bark), which is a much weaker union than it looks. These are common failure points in the silver maples and fruitless mulberries planted through Redding's older neighborhoods.

6. Check for previous partial failure. A large healed wound, a broken-off major limb, or a visible scar from a past storm all indicate the tree has already partially failed once — worth a second look even if it seems stable now.

7. Measure the fall zone. Pace out the tree's approximate height along the ground from its base. A hazard sign matters most when a house, driveway, fence, parked car, or power line sits inside that circle.

Sorting the in-between cases

Between "obviously fine" and "obviously an emergency" sits most of what actually gets a phone call. A few common Redding cases:

• A big oak with a hollow section. Blue oaks and valley oaks can carry significant internal decay and remain structurally sound for decades — a hollow trunk alone isn't an automatic removal verdict. Pair it with a lean, a crack, or heavy deadwood on that side, and it becomes one.

• A pine gone brown from the top down. Once a ponderosa or gray pine is more than a third brown, it's not coming back — bark beetles finish what drought stress starts. That's a "schedule the removal" situation, not usually a same-day emergency, unless it's also leaning toward something.

• A tree that dropped one big limb in a storm. If the rest of the tree looks structurally sound and the wound isn't at a major union, this is often a pruning and wound-management situation, not a removal — see our trimming and pruning guide.

If the tree does need to come down

A genuinely hazardous tree can be removed under Redding's tree ordinance without a standard permit, using the hazard exemption at RMC §18.45.040.G — but the qualified professional's written opinion (from a Registered Professional Forester, ISA Certified Arborist, or qualifying biologist) needs to reach the City's Development Services director before the tree is removed, not as after-the-fact justification. Full detail is in our permit guide.

If the hazard is a neighbor's tree, not yours

Under California law, a tree owner is liable for damage from a fallen tree only on a negligence standard — they knew or should have known it was hazardous and failed to act. A healthy tree that fails in a storm is generally treated as an act of nature. If you've spotted a real hazard sign on a neighbor's tree, putting your concern in writing is what turns "should have known" into "knew" if it later falls — see our neighbor tree law guide for the statutes and the practical steps. This is general information, not legal advice.

What to do next

If what you're looking at is already down, hanging, or actively failing, go to our emergency tree removal guide instead — this page is for deciding how urgently to act, not for a tree already in the middle of failing. If it's clearly dead but not an active hazard, see dead tree removal. Otherwise, get a free on-site estimate — every company in our comparison offers one — and ask directly whether what you're seeing is a hazard-exemption case.