A more thorough explanation:

Definition: Civil defense is the practice of protecting people from harm caused by wars, disasters, or emergencies. It involves taking steps to prevent harm and helping people recover from the immediate effects of such events. Civil defense policies are the plans and strategies that guide these efforts.

Examples:

• During a war, civil defense measures might include building bomb shelters, evacuating civilians from dangerous areas, and training people in first aid and emergency response.
• In the event of a natural disaster like a hurricane or earthquake, civil defense efforts might involve warning people to evacuate, setting up emergency shelters, and providing food, water, and medical care to those affected.

These examples illustrate how civil defense involves taking proactive steps to protect people from harm and minimize the damage caused by emergencies. By planning ahead and being prepared, civil defense measures can help save lives and reduce the impact of disasters.