Which of the following is the best thing to do during heavy lightning?

When you are in the house no contact with water during a thunderstorm because lightning can travel through a building’s plumbing. 

Never lie flat on the ground. Be minimal contact with the ground, because the earth can carry lightning charges and gives you a shock. 

Never shelter under an isolated tree, because lighting struck tall objects. 

To be safe from lightning stay indoors, and away from metallic doors or windows, lightning can travel through any metal wires or bars in concrete walls or flooring.