The Imus River contributes to the flooding in the lowland areas of Cavite province. This study aimed to assess the flood risk of the Imus River Basin at different rainfall and land use change scenarios. The hydrologic model of the upstream basin was developed in Hydrologic Engineering Center (HEC) - Hydrologic Modeling System (HMS) and subjected to calibration and validation. The simulated hydrograph fitted very well with observed data as indicated by the NSE, Percent Bias (PBIAS), and Ratio of Root Mean Square Error (RSR) values of 0.903, -0.0376, and 0.3, respectively during calibration, and 0.818, -0.044, and 0.40, respectively after validation. Sensitivity analysis showed that the storage coefficient had the greatest effect while the initial abstraction had the least effect on the model results. With a constant increase of 2.08% in built-up areas from 2015 to 2025 based on the land cover surveys, the peak discharge increased by 2.33% and runoff volume by 1.86% on average. The downstream hydraulic model was done using in Hydrologic Engineering Center (HEC) – River Analysis System (RAS) and flood maps for normal and climate change-affected conditions were generated to show the extent of flooding. Areas affected by the flood were those situated in the cities of Imus and Bacoor and some portion of the municipality of Kawit.