Blue Mountains

Flood, storm and tsunami (natural hazards) can happen at any time in NSW. It is important to be aware of the risks in your area to help you to plan, prepare, respond and recover effectively. Understanding past and potential future hazards in your area helps you to make informed decisions that can reduce the impact on individuals, families, businesses and communities.

The local information page provides valuable resources for your Local Government Area (LGA). You can explore flood information for your local river catchment through Local Flood Insights, access local flood plans and guides, and connect with local councils and NSW SES units.

Hawkesbury-Nepean Catchment

This local government area is part of the Hawkesbury-Nepean Catchment area.

The Hawkesbury-Nepean Valley covers a wide area in Western Sydney from Bents Basin near Wallacia to the Brooklyn Bridge. The area has a long history of dangerous and deep flooding.

The unique geography in the valley affects the extent and depth of flooding in the region. Most river valleys tend to widen as they approach the sea. The opposite is the case in the Hawkesbury-Nepean Valley, which means floodwaters flow into the valley more quickly than they can flow out, causing them to back up and rise rapidly.

If you live or work in an area with risk of flood, your home, family and animals may be vulnerable. It's important to always be prepared for floods in the Hawkesbury-Nepean Valley as floods can happen anytime. Use the interactive flood mapping tool which allows you to check your flood risk and provide information at a suburb level. For more detailed information on risk related to your property or street, please contact your local council.

Check your flood risk in the Hawkesbury-Nepean Valley area

More information and planning resources can be found by visiting our Hawkesbury-Nepean Valley information page.

Hawkesbury-Nepean Valley area