Things like extremely cold temperatures will cause trees to explode under certain circumstances! The explosions can actually be caused by three different elements: cold, fire, and lightning. It is also caused by stresses in the tree trunks.
For example, Maple trees explode when their sap freezes and it’s said to sound like a gunshot. The Sioux and the Cree Native Americans call the first new moon of the year as the “Moon of the cold exploding trees.” Some trees, like the eucalyptus native to Australia are highly flammable and explode during bush fires.