[THIS IS A PRESS RELEASE]
The Philippine Space Agency (PhilSA) produced flood extent maps showing flooded areas in parts of Regions 1, 2, 3, 4A, 4B, CAR, and NCR on 31 August at 05:45 AM PhST following heavy rains brought by the enhanced Southwest Monsoon (Habagat). The maps show flood extents on Monday morning after continued heavy rains last week. The flooded areas were detected with the aid of Artificial Intelligence (AI) using a composite of three Sentinel-1 Synthetic Aperture Radar (SAR) satellite imagery. Please note that the maps show a snapshot of the flood extents at the specific time the image was captured by the satellite and may not reflect floods that have already receded.
SAR satellite imagery is useful in flood mapping because SAR signals can penetrate through clouds that often cover large areas during storms, and regardless of daylight conditions, unlike optical imagery. However, SAR may underestimate flooding in urban and densely vegetated areas because complex surfaces may affect the backscatter data being measured and reduce flood detection accuracy. Please note that these maps remain subject to ground validation.
PhilSA supports the National Disaster Risk Reduction and Management Council (NDRRMC) in monitoring the situation and prioritizing areas for response through the analysis of wide-area coverage satellite data. By making space data accessible to stakeholders, PhilSA enables informed decision-making and strengthens disaster response.
Access the maps and shapefiles of flood extents on August 26, 30, and 31 here:
31 August at 05:45 AM (Regions 1, 2, 3, 4A, 4B, CAR, and NCR): https://tinyurl.com/Flood-20260831-S1C
30 August at 05:54 AM (Region 1, Zambales, and parts of Abra): https://tinyurl.com/Flood-20260830-S1D
26 August at 06:06 PM (Regions 1, 2, 3, 4A, 4B, CAR, and NCR): https://tinyurl.com/Flood-20260826-S1C
Follow us on social media for the latest updates: https://linktr.ee/philspaceagency
[END OF PRESS RELEASE]
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