The Department of Biodiversity, Conservation and Attractions have issued a smoke alert for Mandurah, Dwellingup and Waroona.
The smoke in the Shire of Murray and Waroona is a result of a prescribed burn being carried out today, with authorities saying it could linger for several days.
The smoke alert for Mandurah is a result of prescribed burns in the Perth Hills and is expected to clear by Saturday afternoon.
WHAT TO DO:
If the smoke is particularly thick, it is recommended people shut doors and windows and turn off air-conditioners.
Smoke may reduce visibility on some roads and motorists should take care, turn on headlights and travel at appropriate speeds when travelling in these areas.
People with asthma and pre-existing respiratory or cardiovascular illnesses should follow their pre-prepared treatment plan.
People with conditions exacerbated by smoke should take precautions in line with their medical advice for these circumstances.
KEEP UP TO DATE:
Visit www.emergency.wa.gov.au, call 13 DFES (13 3337), follow us on Twitter or Facebook, listen to ABC Local Radio or listen to news updates.
