Overall Green alert Flood
in New Zealand

Flood impact summary

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

GDACS ID: 1101859
Deaths: 0
Displaced: 3810
Region: Omahu, Ormond, Gisborne, Opotiki, Thames, Dargaville, Muriwai, Wairoa, Putorino, Maketu, Puketapu, Taradale, Meeanee, Central Hawke s Bay District, Northland, Waikato, Auckland, Whangarei
Countries: New Zealand
From - To 12 Feb - 14 Feb
Known identifiers for this event:


For more info on GDACS alert score click here.

Impact Assessement as of 14-02-2023

SENDAI Indicator B N Country Location Info
affected 1 New Zealand Muriwai
affected 4000 New Zealand Wairoa
affected 1 New Zealand Putorino
displaced 50 New Zealand Maketu
displaced 2500 New Zealand Hawke s Bay, Gisborne, Northland, Waikato, Auckland
displaced 30 New Zealand Whangarei
displaced 300 New Zealand Omahu
displaced 200 New Zealand Ormond
displaced 30 New Zealand Gisborne
displaced 300 New Zealand Opotiki
displaced 400 New Zealand Dargaville
SENDAI Indicator C N Country Location Info
houses 50 New Zealand Thames
SENDAI Indicator D N Country Location Info
bridges - New Zealand Omahu, Puketapu, Taradale, Meeanee
water supply - New Zealand Central Hawke s Bay District

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2023-02-05 / 2023-02-21  

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 3810 displaced 12 Feb 2023 14 Feb 2023 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.