01/28/2026
With this lasting cold snap, there’s been some talk about “exploding trees.” ❄️🌳
Despite the dramatic name, trees aren’t actually exploding. What people are often hearing or seeing are sudden cracks or splits caused by rapid temperature drops. As a tree cools quickly, the outer layers contract faster than the inner wood, creating stress that can result in a loud cracking sound, sometimes startling enough to earn that nickname.
Read a great post about it below!
Dubuque County Conservation
What’s with all the talk about “exploding trees”?
You may have seen headlines or posts lately about trees “exploding” during winter cold snaps. While it sounds dramatic, what’s really happening is a result of extreme weather swings.
Just two weeks ago, temperatures were above 50°F. Today, we’re looking at -5°F with wind chills dipping below -25 to -40°F. That kind of rapid temperature change is tough on many living things including trees.
When temperatures are warm, trees begin moving sap through their tissues. Sap contains water. When temperatures suddenly plunge, that water can freeze quickly. As it freezes, it expands, and the tree’s internal tissues may not be able to handle the pressure. The result? Cracks, splits, or shearing sometimes loud enough to sound like a boom echoing through the woods.
So no, trees aren’t really exploding it’s more like snapping, cracking, or popping.
If this sounds familiar, think about your home. Have you ever heard your house creak, moan, or crack during extreme cold? Buildings contract in cold temperatures, and trees respond in a similar way.
Does this hurt the trees?
It can especially if it happens more often. Trees that are already stressed, damaged, or growing in urban environments are more susceptible. As extreme temperature swings become more common, this type of damage may become more frequent as well.
