Firefighters have managed to slow the spread of a dangerous bushfire burning north of Perth. Still, authorities fear the upcoming extreme weather conditions will impede efforts to bring it under control. The Red Gully blaze which has been burning since Saturday Jan. 2 now has a perimeter of more than 100 kilometres and destroyed over 9500 hectares in the Gingin and Dandaragan shires. An emergency warning remains for local communities around the two shires, with major concerns for Ocean Farms Estate residents. Authorities urge residents to enact their bushfire plans and evacuate immediately if safe to do so. Emergency Services Commissioner Darren Klemm said the efforts of firefighters and aerial support managed to halt the western flank of the fire about three kilometres from Ocean Farms Estate. But he said the extreme heat and wind conditions are a devastating combination which could result in small fires going out of control. …