Two people were evacuated from a flat fire in Chadwick Road, Peckham, yesterday morning.
The adults fled the property before fire brigade arrived on scene and were treated by the London Ambulance Service for smoke inhalation.
The blaze ripped through four rooms on the basement floor and was brought under control just before 6am.
Two fire engines from Deptford and Peckham fire stations attended the incident.
The cause of the fire is under investigation.