Climate change, urbanisation and ageing infrastructure are increasing the frequency and severity of flooding.

Melbourne Water is working with local councils to update flood maps across the Greater Melbourne area using the latest computer modelling, current and forecast rainfall data, and local knowledge. This will help us better plan and prepare for future flood events.

The flood maps will provide a more accurate and consistent approach to identifying the location and severity of flood risks. The maps can assist with:

• Emergency response to flooding
• Council stormwater drainage management, maintenance and capital works programs
• Reducing flood risks for future development.

Thank you to everyone who provided their feedback for the Monash Flood Mapping Project in early-2025.

We will review the locations submitted and check if they are currently in a flood zone or identified for future drainage upgrades. Minor drainage works or preventative maintenance will be carried out where possible.

The local flooding information provided by the community and Council will be used to help verify the flood mapping model being prepared by Melbourne Water.

We expect the modelling to be completed by the end of 2025, with updated flood maps to be published in 2026.