Overall Green alert Flood for Australia
in Australia

Flood impact summary

Flood Australia is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

GDACS ID: 1100794
Deaths: 2
Displaced: 40400
Region: Greater Western Sydney, Hunter Region, Mid North Coast, New South Wales, Mid-Coast Council
Countries: Australia
From - To 16 Mar - 22 Mar
Known identifiers for this event:

GDACS Score

For more info on GDACS alert score click here.

Impact Assessement as of 24-03-2021

SENDAI Indicator A N Country Location Info
death 1 Australia Scenic Rim Regional
death 1 Australia Greater Western Sydney
SENDAI Indicator B N Country Location Info
affected 1 Australia -
affected 5 Australia -
affected 15 Australia Greater Western Sydney
affected 1 Australia Hunter Region
affected 15 Australia Mid North Coast
affected 11700 Australia New South Wales
displaced 40000 Australia New South Wales
displaced 100 Australia The Gemfields
displaced 300 Australia Scenic Rim Regional
rescued 1 Australia The Gemfields
rescued 2 Australia Scenic Rim Regional
rescued 700 Australia Sydney, Mid-Coast Council

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2021-03-09 / 2021-03-29  

Tuesday 09/03Wednesday 10/03Thursday 11/03Friday 12/03Saturday 13/03Sunday 14/03Monday 15/03Tuesday 16/03Wednesday 17/03Thursday 18/03Friday 19/03Saturday 20/03Sunday 21/03Monday 22/03Tuesday 23/03Wednesday 24/03Thursday 25/03Friday 26/03Saturday 27/03Sunday 28/03Monday 29/03

Timeline of revisions

For accessing reports of previous advisories, please click on the advisory number in the table below.

IDAlert ColorPopulation affectedStart DateEnd DateSource
1 0 deaths and 100 displaced 16 Mar 2021 18 Mar 2021 GLOFAS
2 1 deaths and 300 displaced 22 Mar 2021 24 Mar 2021 GLOFAS
3 1 deaths and 40000 displaced 18 Mar 2021 22 Mar 2021 GLOFAS

Flood polygons

This polygon (translucent blue with a blue border) is drawn by the analysts recording the flood event. It is meant to include all the areas reported as affected, by official source or the media. It does not represent the area actually under water.

Microwave flood detection

Flooded area, as detected in microwaves by the Global Flood Detection System of the JRC, based on NASA TRMM/GPM observations. This system has a rather low resolution (of 5-10km) but is not affected by clouds.
For more details, see http://www.unisdr.org/files/9622_LBNA23303ENC002.pdf.
The areas with a flood signal along the coast are an artefact of the system and should not be considered.

Optical Flood detection

Flooded area as detected in optical wavelengths by NASA/MODIS, known as "MODIS Flood Product". Data are made available by NASA GSFC Flood Mapping Project, http://oas.gsfc.nasa.gov/floodmap/index.html. Resolution of 250m, heavily affected by cloud cover.