Emergency authorities have lifted the evacuation zone following a major fertiliser plant fire at Port Adelaide, after firefighters successfully brought the blaze under control. The incident generated thick toxic smoke that drifted across nearby suburbs, prompting emergency warnings and advice for residents to remain indoors and keep doors and windows closed.

Fire crews, hazardous materials specialists and other emergency services responded to the industrial site, working for several hours to contain the fire and reduce the risk posed by the smoke plume. Once monitoring confirmed that conditions had improved, authorities downgraded the emergency and allowed residents to return to normal activities, while advising people to continue following any remaining health guidance.

Two workers who were affected during the incident were taken for medical assessment. Officials said their condition is being monitored, while workplace safety investigators will examine the circumstances surrounding the fire. The cause has not yet been officially confirmed.

Environmental monitoring teams have continued checking air quality around the affected area. Authorities stated that the immediate danger has reduced significantly since the fire was extinguished, although investigations and site safety assessments remain ongoing before normal industrial operations can resume.

Port Adelaide is one of South Australia's most important industrial and logistics precincts, handling manufacturing, storage and freight activities. Incidents involving industrial facilities require coordinated responses because of the potential impact on nearby residential communities, transport routes and the environment.

Emergency services thanked residents for following official advice during the incident. Authorities emphasised that rapid public cooperation helped reduce potential health risks while firefighters and hazardous materials crews worked to control the situation safely.

Investigators will now focus on determining how the fire started, assessing damage to the facility and identifying any measures needed to prevent similar incidents in the future. Further updates are expected once technical inspections are completed.