See the NSW floods’ record-breaking rainfall in charts and a Sydney flood map

Nick Evershed
·1 min read

Eastern New South Wales is once again experiencing extremely heavy rain, with flooding hitting the Sydney region and the heaviest falls concentrated on the Illawarra and Shoalhaven regions, causing flash flooding in the area.

Here you can see maps and charts that show the extreme rainfall that has fallen across NSW. This map shows rainfall and flood-affected areas in the greater Sydney region and surrounds, with the total weekly rainfall up to 4 July:

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The chart below shows how the cumulative rainfall for 2021 compares with long-term averages. The blue shaded section indicates wetter-than-average years, so if the red line for 2021-22 goes above this, it indicates an unusually high level of rainfall (the top 10% of years by total rainfall, and top 1% of years by total rainfall).

The rainfall for the year-to-date in Sydney, measured from Observatory Hill, continues to be the wettest year on record.

You can also toggle the menu to see the cumulative rainfall in other locations:

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The chart below shows the river height in key areas affected by flooding and how they compare with height markers that indicate minor, moderate and major flooding. Please note that you should check the Bureau of Meteorology or State Emergency Service in your area if you think you might need to evacuate rather than relying on this chart.

Toggle the menu to see the water levels for other rivers:

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This chart shows river heights against historical river heights, for as far back as Water NSW has records available online. Again, you can use the menu to select different rivers:

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We will update this page with new data and information as it becomes available.

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