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Poison oak is similar to poison ivy in that it's in the same family of plants. Poison oak is identifiable by its rounded-off leaves and hairy leaf texture. Tree-climbing varieties live primarily in western states while low-growing poison oak bushes occupy the eastern states. Treat poison oak like poison ivy to get rid of it permanently.

White vinegar does not kill ivy on trees because its acetic acid concentration is not high enough to overpower it. Vinegar is an effective herbicide for weeds and other plants, but not for the strength of most ivies, including poison ivy and English ivy. You should use an herbicide to kill ivy, such as one with glyphosate, imazapyr, or triclopyr.

Stay inside or well away until the storm passes. Don’t go outside to inspect the tree until the weather clears, especially if the tree is on a hill or isolated in a field. Lightning often strikes the same easily-accessed places multiple times, and you could be a new target. If a lightning strike causes a noticeable fire, alert emergency services. When the storm is over, take a closer look to gauge the damage done.

The best way to protect tree roots is to avoid the roots entirely by excavating outside the root radius of the tree. For nearby projects, it’s a good idea to construct a temporary retaining wall. But that’s not always possible, depending on the project and the root system. In these cases, consider using alternative equipment like an auger to tunnel under the ground.

Remember, tree roots can damage nearby cement foundations as they grow. If a tree is close enough to interfere with large excavations, it may be better to remove the tree than risk future problems.