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: 1102301
Deaths: 10
Displaced: 510
Region: Lamporecchio, Montemurlo, Rosignano Marittimo, San Miniato, Florence, Calcinaia, Campi Bisenzio, Pistoia
Countries: Italy
From - To 30 Oct - 04 Nov
Known identifiers for this event:


For more info on GDACS alert score click here.

Impact Assessement as of 05-11-2023

SENDAI Indicator A N Country Location Info
death 1 Italy Lamporecchio
death 1 Italy Montemurlo
death 2 Italy Rosignano Marittimo
death 1 Italy Campi Bisenzio
death 1 Italy Rosignano Marittimo
death 2 Italy Pistoia
death 2 Italy Montemurlo
missing 1 Italy Florence
missing 2 Italy Lamporecchio
missing 3 Italy Florence
SENDAI Indicator B N Country Location Info
affected 12000 Italy Campi Bisenzio
displaced 300 Italy Lamporecchio
displaced 30 Italy Ponte dell Olio
displaced 20 Italy Nago-Torbole
displaced 10 Italy Parco Lambro
displaced 30 Italy San Miniato
displaced 120 Italy Calcinaia
SENDAI Indicator C N Country Location Info
houses damaged 2 Italy Rezzoaglio

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2023-10-23 / 2023-11-11  

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 60 displaced 30 Oct 2023 01 Nov 2023 GLOFAS
2 10 deaths and 450 displaced 02 Nov 2023 04 Nov 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.