A woman and child escaped from a flat fire after being alerted by a smoke alarm.
The woman and the three-year-old were in a first floor flat in Abergele, Conwy, after the fire broke out at about 0915 BST on Thursday.
Fire crews from Rhyl and Abergele were called to Market Street.
The fire started in the lounge, where a heater was switched on. One hose reel and four sets of breathing apparatus were used by fire crews.
The fire caused 50% fire damage to the lounge, North Wales Fire and Rescue Service said.
Gwyn Roberts, operational manager with North Wales Fire & Rescue Service, said that the incident demonstrated the benefits of having a working smoke alarm.
He said: "I can't stress enough how important it is to have working smoke alarms in the home. These alarms provide an early warning signal which is crucial in helping people to escape safely, and this was a key factor in this incident.
"I also urge people not to leave heaters near any flammable materials, as fire can spread in minutes. "
The cause of the fire is still under investigation.