PERTH’S smoke haze forced the diversion of ambulances from the emergency department at St John of God Midland on Wednesday.
They were diverted to Royal Perth and Princess Margaret hospitals between 10am and 12.30pm.
The Midland hospital’s chief executive, Glen Power, said smoke from the prescribed burn-offs had affected some staff and patients.
The staff were treated and sent home when recovered.
He said the smoke had mostly exacerbated existing conditions.
“Due to recent controlled burning in the Hills region, residual smoke settled around St John of God Midland Public and Private Hospitals and the Midland area,” Dr Power said.
“This has been an intermittent issue for the past several days, with mornings and evenings more smoke-|affected than at other times.
“The residual smoke on Wednesday was significantly worse than previous days and a small number of patients and employees were affected.
“The Emergency Department was put on ambulance bypass for a few hours in the morning as a precaution.
“All hospital services and areas operated as normal.”