Flood impact assessment in Mokwa Town, Niger Local Government Area, Niger State, Nigeria as of 2 June 2025

**UNOSAT code: FL20250601NGA, GDACS ID: 1103303** This map illustrates the satellite-detected water extent in Mokwa Town, Niger Local Government Area, Niger State, Nigeria as observed from a GeoEye-1 imagery acquired on 2 June 2025 at 11:24 local time. Within the analysed area of approximately 100 km², an estimated 1.5 km² of land appears to be affected by floodwaters. UNOSAT has identified within this area 470 damaged structures and 199 potentially affected structures. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

**UNOSAT code: FL20240902NGA** This map illustrates the satellite-detected accumulated flood extent in Dikwa Town, Dikwa Local Government Area, Borno State, Nigeria. as observed from Sentinel-2 images acquired on 9 and 19 September 2024. Within analysed areas of about 200 km², a total of about 30 km² of lands appear to be affected with flood waters. UNITAR-UNOSAT identified about 1,060 potentially affected structures, along with a potentially affected road extending about 26 km within the analysed area. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

**UNOSAT code: FL20250928NGA, GDACS ID: 1103409** This map illustrates the satellite-detected water extent in Adamawa, Borno, Gombe, Taraba and Yobe States, Nigeria, as observed from Sentinel-2 satellite images acquired on 29 July 2025 at 14:28 local time (13:28 UTC). Within the analyzed area of approximately 47,000 km², about 700 km² of land appears to be affected by floodwaters. Based on WorldPop population data and the flood extent, approximately 19,000 people are potentially exposed or living close to the flooded areas. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

**UNOSAT code: FL20240902NGA, GDACS ID: 1102720** This application provides flood impact assessments for Nigeria in September 2024.

satellite imagery by Maxar, acquired 2025-06-02 to 2025-06-02, 30.8 cm per pixel, published on OpenAerialMap.

**UNOSAT code: FL20240902NGA, GDACS ID: 1102720** This map illustrates cumulative satellite-detected water using VIIRS in Nigeria between 5 to 9 September 2024. Within the cloud free analyzed areas of about 815,000 km², a total of about 14,000 km² of lands appear to be affected with flood waters. Based on Worldpop population data and the maximum flood water extent, about 2,650,000 people are potentially exposed or living close to flooded areas. The pixelwise water fraction from VIIRS, using a 5-day composite at 375 m spatial resolution, indicates potential floodwater coverage ranging from 0% to 100%. This large-scale analysis is intended for guidance purposes and has not yet been validated with ground truth data or higher-resolution analysis. The population exposure analysis is based on floodwaters observed only in cloud-free areas, so the total number of people exposed may be underestimated. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).