Police are investigating the circumstances surrounding a house fire in Corio on 14 September.

Emergency services were called to Vermont Avenue following reports of a house fire just before midday.

A 29-year-old resident of the property sustained life-threatening injuries and has been airlifted to a The Alfred hospital.

The area has been cordoned off, and a crime scene has been established.

The circumstances surrounding the fire are not being treated as suspicious.

Anyone who witnessed the incident or with information is urged to contact Crime Stoppers on 1800 333 000 or online at www.crimestoppersvic.com.au.