The Department of Parks and Wildlife has issued a smoke alert for Perth metropolitan area and surrounds.
The smoke is from various bushfires in the south-west.
The smoke is expected to clear by later today.
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 http://emergency.wa.gov.au, follow us on Facebook and Twitter, or listen to news bulletins
The next update will be issued when the situation changes