Overall Green alert Flood
in Italy

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: 1101976
Deaths: 17
Displaced: 36450
Region: Celzi
Countries: Italy
From - To 01 May - 26 May
Known identifiers for this event:


For more info on GDACS alert score click here.

Impact Assessement as of 26-05-2023

SENDAI Indicator A N Country Location Info
death 1 Italy Castel Bolognese
death 1 Italy Fontanelice
death 14 Italy Bologna, Ravenna, Forlì-Cesena
death 1 Italy Celzi
SENDAI Indicator B N Country Location Info
affected 60 Italy Treviso, Vicenza, Padova, Rovigo, Veneto
affected 30 Italy Palermo
affected 40 Italy Metropolitan city of Catania
displaced 450 Italy Ravenna
displaced 36000 Italy Ravenna, Bologna, Forlì-Cesena
rescued 7 Italy Marche
SENDAI Indicator C N Country Location Info
houses 20 Italy Province of Nuoro

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2023-04-24 / 2023-06-02  

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 2 deaths and 450 displaced 01 May 2023 03 May 2023 GLOFAS
2 0 deaths 10 May 2023 12 May 2023 GLOFAS
3 0 deaths 15 May 2023 17 May 2023 GLOFAS
4 0 deaths 15 May 2023 17 May 2023 GLOFAS
5 14 deaths and 36000 displaced 16 May 2023 18 May 2023 GLOFAS
6 0 deaths 20 May 2023 22 May 2023 GLOFAS
7 0 deaths 20 May 2023 21 May 2023 GLOFAS
8 1 deaths 25 May 2023 26 May 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.