Warnbro station and a large part of the Mandurah train line have been closed as firefighters battle a bushfire burning in Perth's south. 

There is a possible threat to lives and homes from the out-of-control blaze in parts of Cooloongup, Waikiki and Warnbro in the City of Rockingham, about 60 kilometres south of the Perth city centre.

Unexploded ordnance and windy conditions have created challenging conditions for about 100 firefighters battling the blaze. 

Water bombers are being used to help fight the bushfire near Rockingham. (ABC News: Lauren Smith)

Dramatic video of the scene filmed by a bus passenger shows a wall of flames surrounding Warnbro Station last night, but authorities say the station was not damaged and there were no reported injuries.

Trains on the Mandurah line have been cancelled between Rockingham and Mandurah, while the station has been shut.

Residents living in the highly populated area have been warned about ember attacks.  (ABC News)

Strike Force Vulcan, which is led by detectives from the WA Police arson squad, is investigating the cause of the fire, which started around 7pm yesterday in bushland next to Safety Bay Road in Warnbro. 

Lucky escape

DFES spokesperson Rachael Robertson said Warnbro train station was lucky to escape damage, and flames had come very close.

"Luckily nobody was injured. That was a result of quick reaction from the public in reporting it and rapid response by fire crews," she said.

The fire has forced the closure of several roads.  (ABC News)

She said crews had worked through the night to strengthen containment lines, and access had been made especially difficult by unexploded ordnance in the area.

"The crews were up against a fair lot of challenges because the fire was in an area that we can't access,"

Ms Robertson said.

"The fire was quite erratic and there was spotting up to about 100 metres ahead of the main fire and fire activity in three different areas along Ennis Avenue."

A bushfire burning near Rockingham in Perth's south prompted a warning for residents in parts of Waikiki, Warnbro and Safety Bay to prepare to leave their homes on the evening of Monday, December 29, 2025. (Facebook: Jimmy Angus)

Crews fatigued

She said conditions were windy this morning, and crews were battling to try to get the blaze under control before an expected wind change around 3pm.

Ms Robertson said firefighters had been kept busy in recent days by a number of emergency level fires in the region, including a huge blaze at Boddington on Christmas Day.

"All our crews are very fatigued but they're going the extra mile now to keep the public safe," she said.

There is a possible threat to lives and homes in parts of Waikiki, Warnbro and Cooloongup. (Facebook: Manda Vaccaa)

Replacement buses are running between Rockingham and Mandurah, while trains will continue to run between Perth and Rockingham.

A bushfire watch and act warning is in place for people bounded by Mandurah Road, Safety Bay Road, Read Street, The Avenue, Wilmott Drive and Seagate Street.

The fire sent a thick plume of smoke billowing into the sky on Tuesday morning. (ABC News: Lauren Smith)

Residents living in the highly populated area have been warned that ember attacks may spark fires around their homes.

Drivers have been asked to exercise extreme caution around the Warnbro area due to heavy smoke, and large sections of Safety Bay Road have been closed. 

As well as the Lake Cooloongup Reserve, the watch and act area covers a large portion of residential Warnbro, and includes at least three schools, a shopping centre and a small private hospital.

Anyone with CCTV, mobile phone or dash cam vision that may help investigators is urged to upload it via this link.