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The detection of the spatio‐temporal extent of inundation resulting from the floods in 2004 and 2007 in Bangladesh has been studied using time‐series MODIS surface reflectance data. Flood inundation maps were developed from vegetation and land water surface indices derived using surface reflectance. The inundation map developed using MODIS data was compared with a corresponding RADARSAT image, where both images refer to the satellite‐based remote‐sensing data. The estimates show a strong correlation with the inundation area derived from the RADARSAT products (coefficient of determination of R²: 0.96). The paper shows that it is possible to study flood dynamics by assessing inundation and recession patterns and to perform flood assessments similar to the high‐resolution (50 m) microwave satellite, RADARSAT‐based flood assessments using products derived from MODIS 500 m imagery …