Home fires happen regularly. Every year people needlessly lose their lives in house fires. Reduce the risk by installing smoke detectors and keeping an extinguisher handy.
Vehicle fires are not uncommon. Vehicles are essentially motorised tinderboxes. A fire extinguisher will put out a smaller fire before the entire vehicle becomes engulfed.
Boat fires are a real problem due to the confined nature of boats and the lack of escape routes. Smoke alarms and fire extinguishers will give you options if a problem arises.