Daylight saving ends this Sunday and residents are reminded that it's time to change their smoke alarm batteries.
Fire & Rescue NSW Commissioner Greg Mullins particularly urged elderly residents, aged over 65, to do so since a third of all preventable fire deaths in NSW occur in this age group.
"A fire can take hold in less than three minutes, filling your home with deadly smoke," Commissioner Mullins said. "A working smoke alarm gives you vital seconds to get out.
"The most important thing those over 65 can do to reduce their risk of fire in the home is to have a working smoke alarm."
There have been four deaths from house fires in NSW so far this year, all involving elderly people.
If you can't climb a ladder and have no one to help you, firefighters will come out and replace seniors' smoke alarm batteries for free.