Residents urged to leave as firefighters battle blazes in Victoria, South Australia

Firefighters are currently battling the blaze, which is already tearing through homes. Photo / Nine News / Twitter

Residents have been urged to leave as firefighters battle an out-of-control bushfire at Carrum Downs in Melbourne, while an emergency warning has been issued for a grass fire in Glenormiston in Victoria's southeast.

Thirty fire crews have been dispatched to battle the Carrum Downs blaze, which broke out on Blue Wren Rise at around 2:40pm. A watch-and-act warning has been issued for residents in Carrum Downs, Frankston North, Langwarrin and Skye.

The fire was travelling in a southerly direction towards McClelland Drive and residents were being warned to leave immediately as conditions may change very quickly.

A bushfire burns houses in Flora Park Way, Carrum Downs in Melbourne. Residents in western Victoria are being told it's too late to leave. Photo / AAP

#BREAKING: People in the immediate area of Carrum Downs fire are being urged to leave - could pose a threat to lives and houses @9NewsMelb @9NewsAUS pic.twitter.com/MlqObPbbCt

— Angus Ledwidge (@angusleddo) January 6, 2018

An out-of-control blaze was also burning near Sherwood in southeast South Australia on Saturday afternoon, with residents warned to take cover.

The fire has been described as "extremely dangerous", with areas affected including Dark Island Road, Emu Flat Road, Wurlyana Road, Eckert Road and Wirrega North Road.

An emergency warning has been issued for residents in Sherwood, Brimbargo, Lowan Vale and McCallum as the fire moves in a south-easterly direction. "If you are in this area, you are in danger," the Country Fire Service said in a statement. "There is a risk to your life and property."

Local farmer Robyn Verrall told Nine News that her husband was fighting the blaze, which broke out about 20km from their property. "At [the] fire scene, it's a wall of flames," Verrall said.