UPDATE:

StateAlert - WA's new emergency warning system - is currently being trialled around the Bedfordale area. StateAlert uses mapping software to automatically deliver emergency warnings to fixed line phone numbers and mobiles registered to addresses in a specific-defined area where lives may be under threat. Read more here
More information will be displayed as the trial is completed. In the mean time, the alert-means below remain active.

The Fire and Emergency Services Authority of Western Australia (FESA) have since 2005, broadcast emergency alerts for major bushfires that are deemed a threat to public property, life, or nearby residents.
The alerts contain up-to-date situation reports, containing information such as location/size/severity of the fire, number of firefighting resources deployed, advice to residents (eg whether to evacuate; and if so, where to) and the expected developement of the fire in the future.

To cater for demand and diversity, the fire alerts are available through three media outlets: phone, radio & internet. Although being broadcast through different outlets, it should be noted the fire alerts are standard in their content.

IMPORTANT: Do not call Triple Zero (000) for bushfire information. The operator will not be able to assist you

Phone

For a recorded message any current alerts, ring 1300 657 209

Radio

Radio presenters from your local radio (720AM in Perth) will broadcast any current FESA alerts every 15 minutes. An expanded update of the fire situation, sourced by reporters, will usually be presented in conjunction with ABCs hourly news update.

Internet

FESA posts alerts on their website here http://www.fesa.wa.gov.au/internet/Alerts/
A XML feed also displays any alert to the left of screen