Malabon City in the Philippines, which consists of 21 Barangays (Districts), needs proper assessment of flooding for the city has been adversely affected by rainfall, high tide, and simultaneous events of rainfall and high tide for more than two decades. Both local and regional government agencies have put in place structural as well as non-structural measures to alleviate the flooding and its damages; however it has been observed that up to this time these adverse effects still exist.

The study attempts to do a risk-based analysis of the city's flooding events due to rainfall, high tide, and simultaneous events through determining to the extent to which the study area is susceptible to the flood risk factors. It uses a methodology for measuring flood risk in each barangay, where risk is a function of Hazard, Vulnerability, Exposure, and Capacity. The results show that of the 21 barangays, the four (4) barangays that are consistently most exposed to flood risk are Catmon, Longos, Tanyong and Tonsuya; while the barangay that has been consistently least exposed to risk is Flores.

To reduce the exposure to the risk of flooding in the barangays of Malabon City, the study recommends the use of risk-based analysis that includes both structural and non-structural measures to alleviate flooding and its damages to the residents. The flood risk indices produced in this study give an objective assessment of which barangays should be given more attention in terms of programs aimed at alleviating the effects of flooding and which among the components that contribute to flood risk be addressed first especially when resources of the local government are limited.