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Every year in the United States 2,600 deaths occur because of residential fires, many times from exposure to smoke and toxic gases, and just a few breaths of toxic smoke can render a person unconscious. Smoke detectors save lives and prevent injury by providing residents valuable time in escaping from a fire. Those who live in a home without working smoke detectors are twice as likely to die in a fire as those living in a home with working detectors.
Batteries in smoke detectors should be changed at least once a year, and changing clocks can provide a useful time to remember that smoke detector batteries need to be replaced. Most alarms should be replaced entirely after about 8 to 10 years.
For more information and tips about smoke detectors, visit the U.S. Fire Administration's website at https://www.usfa.fema.gov/citizens/focus/smoke_alarms.shtm