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Homeowner guide

Storm Damage and Iowa Trees: What to Do, What to Expect

Iowa sits in derecho and thunderstorm country — the 2020 derecho alone damaged an enormous share of the state's urban canopy, and every summer brings wind events that break trees. Here's the sober playbook.

Immediately after a storm

1. Power lines first. Anything touching or tangled in lines is the utility's problem — stay away and call them. Full stop.
2. Don't walk under hangers. Partially broken limbs (“widow-makers”) drop without warning; they are the classic post-storm injury.
3. Document damage to structures with photos for insurance before cleanup where safe to do so.
4. Triage: trees on structures and blocked access first; standing damage can wait for daylight and a professional look.

Can the tree be saved?

• Often yes: a healthy tree that lost less than roughly a third of its crown, with its leader and main structure intact, usually recovers with proper pruning cuts.
• Usually no: split main trunks, more than half the crown gone, or large wounds into the main stem — especially on mature ash already stressed by emerald ash borer.
• Beware quick verdicts in either direction — an on-site assessment by someone trained in tree biology beats a drive-by opinion.

The repair that isn't

“Topping” storm-damaged trees — shearing everything back to stubs — creates weakly attached regrowth that fails worse in the next storm. Proper restoration pruning takes selective cuts over seasons. Slower, and it actually works.

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