Lightning Struck Gum

Don looked at a gum tree (Eucalyptus nicholii) that was struck by lightning three weeks ago. The side of the tree that was struck is now completely dead, with a scar of exposed red brown bark from top to bottom. All the electrical equipment in an adjoining house was destroyed, and the fuses were blown in another house fifty metres away. The area has a clay soil with ironstone underneath, which explains why the lightning strike caused such widespread damage.

 What happens when lightning strikes trees? The tree may be split open down the length of the trunk or at the base The tree may catch fire Streaks or deep spiral lines can sometimes be seen along the trunk in the bark There may not be any outward signs but the tree may be damaged internally The current often kills the roots

 Deep spiral lines
What to do

You may be tempted to remove obvious damage and then wait and see if the tree recovers. However, in most cases trees struck by lightning eventually die. The best course of action is to call a qualified arborist or tree surgeon, who will assess the damage and remove the tree if necessary.

Further information

To find a qualified arborist or tree surgeon look for members of the National Arborists Association of Australia.

Regulations vary depending on where you live, but you may need council permission to remove dead or dying trees. Check with your local council.

Copyright CTC Productions 2001