Which towns have the largest share of territory in flood scenario P2?
Among municipalities with at least 20,000 residents and provincial capitals, Forlì has the highest share of territory in the P2 flood scenario: 74.4%, according to ISPRA’s mosaic v5.0 (2020), IdroGEO indicators read on 25 October 2026.
The ranking
| Municipality | Territory P2 | Residents in P2 | Residents 2021 |
|---|---|---|---|
| Forlì (FC) | 74.4% | 89.6% | 116,558 |
| Faenza (RA) | 69.8% | 40.9% | 58,899 |
| Imola (BO) | 69.2% | 61.3% | 69,551 |
| San Giuliano Terme (PI) | 66.4% | 63.4% | 30,836 |
| Scandiano (RE) | 64.2% | 83.1% | 25,767 |
| Massarosa (LU) | 60.6% | 71.8% | 21,823 |
| Bologna (BO) | 57.7% | 43.1% | 387,842 |
| Verbania (VB) | 56.7% | 7.5% | 29,856 |
| Cesena (FC) | 54.1% | 59.4% | 96,168 |
| Rimini (RN) | 53.8% | 69.1% | 149,169 |
| Fidenza (PR) | 51.8% | 25.6% | 26,981 |
| Sassuolo (MO) | 50.7% | 92.5% | 40,469 |
| Pontedera (PI) | 50.4% | 75.6% | 29,284 |
| Catania (CT) | 50.2% | 3.3% | 301,104 |
| Quarrata (PT) | 44.4% | 61% | 26,795 |
| Castel San Pietro Terme (BO) | 43.1% | 35.9% | 20,666 |
| San Lazzaro di Savena (BO) | 42.9% | 33.9% | 32,606 |
| Sarzana (SP) | 42.4% | 35% | 21,610 |
| Cagliari (CA) | 39.9% | 1.8% | 149,092 |
| Viareggio (LU) | 39.8% | 14.6% | 61,045 |
| Vignola (MO) | 39.7% | 78.8% | 25,686 |
| Oristano (OR) | 37.6% | 14.3% | 30,653 |
| Firenze (FI) | 37.3% | 51.1% | 361,619 |
| Piombino (LI) | 36.2% | 4.3% | 32,304 |
| Santarcangelo di Romagna (RN) | 36.1% | 30% | 22,184 |
| Grosseto (GR) | 35.5% | 4.6% | 81,503 |
| Moncalieri (TO) | 35.2% | 25.9% | 56,193 |
| Riccione (RN) | 34.8% | 17.9% | 34,603 |
| Manfredonia (FG) | 34.5% | 13.1% | 54,342 |
| Crotone (KR) | 33.1% | 31.8% | 59,359 |
| Fucecchio (FI) | 32.2% | 44.2% | 22,764 |
| Vibo Valentia (VV) | 32.1% | 22.9% | 31,480 |
| Valsamoggia (BO) | 31.9% | 50.3% | 31,605 |
| Casalecchio di Reno (BO) | 31.2% | 35.8% | 35,784 |
| Cecina (LI) | 30.9% | 6.7% | 27,898 |
| Mondragone (CE) | 29.5% | 4.4% | 28,474 |
| Prato (PO) | 28.3% | 16.4% | 195,213 |
| Capannori (LU) | 27.3% | 27.5% | 46,390 |
| Termoli (CB) | 26.2% | 3.4% | 32,391 |
| Lentini (SR) | 26% | 0.4% | 21,926 |
| Sesto Fiorentino (FI) | 26% | 20.9% | 48,782 |
| Desenzano del Garda (BS) | 25.9% | 0.3% | 29,093 |
| San Benedetto del Tronto (AP) | 25.1% | 11.8% | 47,000 |
| Falconara Marittima (AN) | 24.7% | 6.9% | 25,576 |
| Corigliano-Rossano (CS) | 24.5% | 20% | 74,173 |
| Monsummano Terme (PT) | 24.4% | 5.8% | 20,821 |
| Pescara (PE) | 23.4% | 36.5% | 118,992 |
| Casale Monferrato (AL) | 22.9% | 6.1% | 32,399 |
| Nocera Inferiore (SA) | 22.7% | 47.9% | 44,331 |
| Fiumicino (RM) | 22.4% | 41.6% | 80,738 |
Share of the municipal area in scenario P2 (return period of 100 to 200 years) of the national flood mosaic (v5.0, 2020) and share of residents living there. It is a share of area, not a measure of the risk of an individual house. Population: towns with at least 20,000 residents and provincial capitals; ordered by decreasing share, ties by name. Indicators read on 25 October 2026. Processing: SRI Group BV (VAT BE1037052239).
Other data often matter for the same property too, such as seismic zones by region and the municipalities most exposed to landslides. You can see how a dossier brings them together in the sample dossier.
Sources
Dossier Immobile is a private service by SRI Group BV (VAT BE1037052239), not connected to any public authority: it brings together public data, with the source and date of every item.
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