The Philippine Senate Blue Ribbon committee has launched a formal investigation into 15 major flood control contractors previously flagged by President Ferdinand Marcos Jr., examining contracts, audits, technical reports and testimonies from agencies, local governments and firms. Lawmakers are reviewing procurement processes, project execution and alleged irregularities in national flood control projects and have scheduled further hearings, ordered document submissions and sought special audits as they prepare a committee report that may recommend legislative, administrative or legal actions based on the evidence collected.