Young people and renters are at the centre of fire safety campaigns this daylight saving weekend.
Fire and Emergency is urging everyone check their smoke alarms are working.
Spokesperson Peter Gallagher says people aged between 16 and 24 are less likely than other age groups to have an alarm or check them.
"With young people flatting, the smoke alarm gets forgotten about in favour of other things."
Eighty-eight percent of New Zealanders have at least one smoke alarm, up from 82 percent in 2014.
Gallagher says too many people trust smoke alarms to work, unquestioningly, and do not think they need to test them - but they have a finite life.
"If you've got an alarm and it hasn't got a date of manufacture printed on it, it's likely to be more than 10 years old and needs replacing."
Gallagher also says renters are often confused about whose responsibility it is to check they're working.
"The landlord is responsible for ensuring there is the absolute minimum number of smoke alarms in the building, and the tenant is required to maintain that smoke alarm."
Clocks go back an hour on Sunday morning, so you get an extra hour's sleep if you need it.