As cold temperatures grip parts of Canada and the northern United States, a viral claim has emerged suggesting that trees might explode due to the extreme weather. Currently, many regions are facing an intense freeze, with temperatures plunging below -20°C and wind chills making it feel even colder. This deep freeze results from a polar vortex disruption, affecting states from North and South Dakota to Michigan.
Understanding the ‘Exploding Trees’ Claim
Amidst widespread concern for public safety, the Minnesota Department of Natural Resources addressed the viral post circulating on social media. The post suggested that temperatures could trigger the explosion of trees due to severe cold. The department reassured residents that while cold weather poses risks, trees do not spontaneously explode.
What Causes Frost Cracks?
In frigid conditions, trees can develop frost cracks, especially those with thin bark. Simon Peacock, an ISA-certified arborist, explains that these vertical splits often occur in Prairie regions. The phenomenon happens when rapid freezing causes the water and sap within the tree to expand. This sudden physical pressure can create loud noises that may resemble explosions.
- Frost cracks are typically harmless; trees can heal over time.
- Repeated cracking can leave permanent scars known as “frost ribs.”
- Damage severity varies by species, with hardwoods often more affected.
Trees Most at Risk
Some tree species are particularly vulnerable to frost cracks. These include:
- Elm
- Poplar
- Maple
- Oak
- Ash
- Aspen
- Fruit-bearing trees like apple, peach, and cherry
Non-native species, such as silver maples, are also at greater risk when temperatures drop suddenly. Most native trees have adapted to withstand extreme cold without significant damage.
Other Cold-Weather Phenomena
The cold weather can lead to other surprising phenomena beyond tree cracks. Two notable occurrences are frost quakes and thundersnow. Frost quakes, or cryoseisms, happen when underground water rapidly freezes, causing pressure that results in cracking sounds similar to earthquakes. Thundersnow occurs when moist air meets colder air, creating thunderous sounds that resonate dramatically amidst falling snow.
While the idea of exploding trees may generate concern, experts stress that the sound of cracks is often the most significant risk. As temperatures remain dangerously low, awareness of these winter phenomena can help communities prepare and stay safe.
