Federal Emergency Management Agency (FEMA) did not properly oversee the Louisiana Governor’s Office of Homeland Security and Emergency Preparedness (Louisiana or State) to ensure it complied with Federal regulations and FEMA guidelines. Louisiana and the Office of Community Development (OCD), in turn, did not always properly account for and expend Federal grant funds. Specifically, Louisiana did not provide adequate documentation to support costs, as required by Federal regulations, and FEMA is not requiring the State to provide mandatory documentation to close out the $706.6 million Hazard Mitigation Grant Program (HMGP) grant. Louisiana also has not provided FEMA with required documentation showing that homeowners paid $79.7 million in promissory notes for state-funded mitigation work on their homes. Finally, Louisiana drew down funds exceeding project obligations by $50.4 million due to a lack of FEMA controls. These issues arose primarily because FEMA did not ensure Louisiana exercised proper oversight of the HMGP grant and the State did not comply with Federal regulations. As a result, Federal funds are at risk of fraud, waste, and abuse. We provided five recommendations to FEMA to postpone project closeout until Louisiana provides adequate documentation that supports $706.6 million in costs and that FEMA ensures compliance with Federal regulations and FEMA guidelines. FEMA’s responses were sufficient to close all but one recommendation, which we consider open and unresolved.