Extreme Cold Causes Trees to 'Explode' in Winter Phenomenon

Researchers explain the science behind the loud cracking sounds and scarring on trees during extreme temperature drops.

Apr. 10, 2026 at 7:54am

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A bold, abstract painting in earthy tones of green, brown, and blue, featuring sweeping geometric arcs, concentric circles, and precise botanical spirals, conceptually representing the complex scientific processes that cause trees to 'explode' during extreme winter weather.A conceptual illustration of the intricate scientific forces behind the winter phenomenon of 'exploding trees', a captivating natural process that reveals the power of extreme cold on the natural world.Athens Today

The winter season brings a peculiar phenomenon that has captured the attention of both social media and scientists - the mystery of 'exploding trees.' While the term 'explosion' is a bit misleading, what's actually happening is a fascinating natural process called 'frost cracks' where rapid temperature drops cause the sap or water inside trees to freeze and expand, exerting immense pressure on the bark and wood and leading to loud cracking sounds.

Why it matters

The 'exploding trees' phenomenon highlights the remarkable ways nature responds to extreme cold weather, though the real danger lies in the aftermath as the exposed inner tree becomes vulnerable to insect infestations and infections. Understanding this process can help researchers and the public better prepare for and mitigate the impacts of winter storms on trees.

The details

Professor John Seiler, a tree physiology expert, and his students encountered the aftermath of these 'tree explosions' on a campus, recognizing the peculiar jagged scars on cherry trees. Professor Doug Aubrey from the University of Georgia explains that the water inside the trees expands as it freezes during extreme temperature drops, leading to the loud cracking sounds. The National Forest Foundation confirms there are numerous recorded instances of this, though Seiler reassures it is generally not hazardous to bystanders or the tree itself. The fate of the tree depends on where the freezing occurs - if the stem freezes the entire tree may perish, but many species can regenerate from underground buds if just a branch freezes.

  • During winter storms when temperatures plummet rapidly.

The players

John Seiler

A tree physiology expert and professor who encountered the aftermath of 'tree explosions' on a campus.

Doug Aubrey

A professor at the University of Georgia who explains the science behind the 'exploding trees' phenomenon.

National Forest Foundation

An organization that confirms there are numerous recorded instances of trees 'exploding' due to extreme cold.

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What they’re saying

“That water expands as it freezes, typically during extreme temperature drops.”

— Doug Aubrey, Professor, University of Georgia

“Tree size and structure play a role in the potential impacts.”

— Doug Aubrey, Professor, University of Georgia

The takeaway

The 'exploding trees' phenomenon is a captivating reminder of nature's remarkable responses to extreme cold weather, though the real danger lies in the aftermath as the exposed inner tree becomes vulnerable to further damage. Understanding this process can help communities better prepare for and mitigate the impacts of winter storms on local trees.