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Also to know is, at what temp do trees explode?

Tree sap is a supercooled liquid in cold temperatures. John Hunter observed, in his Treatise on the Blood, that tree sap within a tree freezes some 17 degrees Fahrenheit below its nominal freezing point.

Likewise, what temperature does maple sap freeze? (= 32 °F). Instead water will often "super cool", i.e., drop a few degrees below 0°C before it starts to freeze. When water does freeze an enormous amount of heat is released which very rapidly raises the sapwood temperature to 0°C.

can wet wood explode?

Wet wood produces more smoke than dry wood, which releases more pollutants and small particles into the air. Burning wet wood in a fireplace can also cause creosote buildup in your chimney, which may create a fire hazard, according to University of Illinois Extension.

Do eucalyptus trees self combust?

EUCALYPTUS trees cannot spontaneously combust as they do not have a flash point. But the charred Italian "gum" trees are more the product of lightning or children - they just burn very well.