Floodplain mapping tool

This tool makes it easy for you to learn about flood risk in your area.
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You can view floodplain maps and flood levels, where available, as well as floodplain development strategies. The tool is also useful for industry, especially those in the property sector.

The floodplain maps are intended to be used for general interest and as a land use planning guide. The information presented may be important when you are:

  • buying a new property
  • building a new house
  • planning a new subdivision
  • developing a personal response plan to minimise the impact of flooding on your property
  • purchasing flood insurance
  • performing property valuations.

The floodplain mapping displayed in the tool is the defined flood event for land use planning, in most cases the 1 in 100 (or 1%) annual exceedance probability (AEP) flood event (previously referred to as the 100-year annual recurrence interval (ARI) event).

For site-specific flood advice email us at flood@dwer.wa.gov.au.

For information on building controls regarding major river flooding, please contact your local government authority.

Access the floodplain mapping tool

Flood emergency

The maps should not be used by the public to make decisions during a flood emergency.

For the latest emergency warnings visit Emergency WA, call 13 3337, follow DFES on Twitter or listen to news bulletins.

You can also visit the Bureau of MeteorologyDepartment of Fire and Emergency Services and Main Roads websites for warnings and information.