In the middle of the wind and rain on Monday 24-year-old Greenfields woman Joanne Fealy gave birth to her third daughter at the BP petrol station in Success.

The 3.5kg baby was born in the front seat of the family car while Ms Fealy’s two daughters, aged two-and-a-half and 13 months, looked on from the back seat.

Ms Fealy was in labour for up to four hours and was being driven to hospital by her partner Saul Yarran.

The family had only made it 20 minutes down the road when Ms Fealy’s water broke, about 1km from the service station.

Mr Yarran drove into the emergency lane to the petrol station and ran inside to call for an ambulance.

The Mandurah woman knew the baby was going to be born in the car.

“I couldn’t hold her in,” Ms Fealy said.

Service station attendant Helen Roughley, a police officer and a construction worker helped deliver the baby.

Ms Fealy said she was worried her baby would drop onto the road, but Ms Roughley was there to catch the baby when it was born.

An ambulance crew arrived shortly after, cut the umbilical cord and took mother and baby to King Edward Memorial Hospital.

Ms Fealy said it was scary to give birth in the car but said Aliesha arrived quickly and easily.

“It was all very natural as there were no doctors or pain killers or interference,” Ms Fealy said.