In the event of lightning, what is the best course of action?

Seeking shelter in buildings during a lightning storm is the best course of action for several reasons. Buildings provide protection from lightning strikes, which can be extremely dangerous and even fatal. When indoors, you are shielded from direct strikes and secondary effects, such as electrical surges and flying debris caused by the storm.

Additionally, staying indoors allows you to be in a safer environment where you can remain dry and avoid the risk of being injured by other storm-related hazards, such as high winds or falling objects. It's also important to avoid using wired electronics and appliances while indoors during a storm, as lightning can cause power surges.

The other options present greater risks. Remaining outside exposes you to the dangers of lightning strikes, lying flat on the ground does not provide protection and can increase vulnerability if the ground is struck nearby, and covering your head with a towel does not effectively protect you from the hazards associated with lightning. Therefore, the correct action of seeking shelter in buildings maximizes safety during lightning storms.