Annaliza Tumanda had daughter, Aizee, at the height of the storm and flash floods on the roof of a submerged clinic.
She, her husband and their three children - aged between three and eight – fled their home city after the typhoon hit last weekend.
They fought driving rain and fierce winds to swim through the flood waters to a three-storey house, but the shock sent Mrs Tumanda into labour.
Rescuers spotted them and carried them to the roof of the medical centre where she gave birth to a healthy 6lbs 6oz baby girl.
With God's will, we survived.It was like a miracle, she said
Mother and baby are now recovering in a government-run shelter, where aid workers are battling to cope with the scale of the disaster.
According to United Nations estimates, the family is just another of the 640,000 people who have had their lives ripped apart by the disaster.