From Prince William fire and rescue:
Daylight Saving Time ends [2 a.m.] Sunday, November 3rd. As you turn your clocks back, the Prince William County Fire and Rescue System would like to remind residents to change the battery in their smoke alarms. When properly installed and maintained, working smoke alarms save lives and protect against injury and loss due to fire. You double your chances of surviving a home fire with working smoke alarms compared to homes without working smoke alarms. (Smoke Alarms Save Lives).