List any three safety measures we should observe in case of lightning.

Explanation

**Step-by-Step Text Solution:**

1. **Stay Away from Electrical Appliances**: During a lightning storm, it is important to avoid using electrical appliances such as telephones and televisions. Lightning can cause power surges that may lead to electric shock or damage to the appliances.

2. **Avoid Tall Trees and Metal Fences**: Tall trees and metallic fences can attract lightning strikes. Therefore, it is advisable to keep a safe distance from these objects to reduce the risk of being struck by lightning.

3. **Stay Indoors and Avoid Water**: It is safest to stay indoors during a lightning storm. Additionally, one should avoid swimming or being in water bodies like lakes and swimming pools, as water can conduct electricity and increase the risk of electrocution.

...