Larry Ashcraft
ArboristSite Operative
The version I heard was that a tree hit by lightning simply won't burn, period. I think that may be true of conifers, as some sort of chemical change in the resin may take place, but we had a large, dead cottonwood hit by lightning a few years ago, and what was left of it burned quite well."A tree that has been hit by lightening will not produce much heat when you cut it up and burn it."
The fire department came down and put it out, they thought. Five days later, it flared up again and destroyed about an acre before they could get it out again. The FD spent the better part of an afternoon making sure that fire was out.
They were very glad we had a road right to the burn, because fighting a fire on the river bottom would have been a nightmare if it had gotten out of control. I have some pictures somewhere if anybody's interested, but that should be in a different thread.