While the idea of trees “exploding” sounds like something from a movie, it refers to a real scientific phenomenon called frost cracking. This typically occurs in the USA and Canada during extreme cold snaps, such as the major winter storm currently affecting the Midwest and Northern Plains. Why It Happens? Rapid Expansion: Sap is mostly water, and as it freezes, it expands by about 9%. If temperatures drop too quickly for the tree to adjust, this expansion creates immense internal pressure. Unev