Alerts for a bushfire that threatened homes, an ice skating rink and a theme park in Perth’s south have been downgraded to advice level.

An emergency warning was issued for Cockburn Ice Arena and Adventure World and surrounding homes in Bibra Lake in the City of Cockburn on Tuesday evening, with people urged to take shelter.

The Department of Fire and Emergency Services alert was downgraded to advice level early on Wednesday due to decreased fire behaviour, with some areas including the theme park given the all clear.

The fire remains uncontained and controlled.

Firefighters battled the blaze with support from aerial water bombers.