Spring 2026 Flood Mapping for Québec with Satellite Imagery and Event Data

Open water body polygons derived from radar satellite images and operational data track the 2026 spring floods in Québec. The dataset includes point locations of flood events and affected municipalities recorded by the Ministry of Public Security since April 10, 2026. Satellite images from Sentinel-2, Landsat 8, and the RADARSAT Constellation Mission are processed by Natural Resources Canada's emergency geomatics services.

Use Cases

• Mapping flood extent over time based on open water body polygons derived from radar satellite images.
• Analyzing the spatial distribution of flood-related incidents based on point locations of recorded events.
• Identifying municipalities affected by or under surveillance for floods using the cartographic representation of areas.
• Visualizing floodwater using false-color satellite image composites where water appears turquoise to black.

Strengths

• Includes multiple data layers: flood zone polygons, event points, affected municipalities, and satellite imagery.
• Data is operational and distributed as soon as possible after processing by government geomatics services.
• Available in multiple geospatial formats (GEOJSON, SHP) and as web services (WMS, WFS).
• Satellite acquisitions are planned in collaboration with the Canadian Space Agency and Natural Resources Canada.

Limitations

• Operational data is noted as 'not validated', which may affect accuracy for research purposes.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and dataset size are unknown, which may limit suitability assessment.

Provenance

Source

Deputy Directorate General of Operations of the Ministry of Public Safety, Québec; processed by Natural Resources Canada's emergency geomatics services.

Collection Method

Derived from radar satellite images (RADARSAT, Sentinel-1), operational data, and records from the Civil Security Events dataset.

Time Range

Events recorded since April 10, 2026, with satellite acquisitions during the spring 2026 flood period.

Freshness

Last updated 2026-04-29 17:30:59.549602; freshness should be verified.

Geography

Municipalities and agglomerations in Québec, Canada, affected by spring 2026 floods.