Each year, approximately 3,000 people in the U.S. die from fires in the home. Many of these fires occur at night while people who are sleeping unknowingly inhale toxic gases and smoke. More than half of the fires occur in houses without a smoke alarm. Fires that result in death in houses with smoke detectors are almost always due to not enough detectors or dead smoke alarm batteries. The risk of death from residential fires is cut significantly when you know how to change the batteries in your smoke detector.