MANILA, Philippines — The Philippine president and Congress have begun looking into possibly massive corruption in flood control projects that may implicate public works officials and engineers, construction firms and politicians in one of the countries most vulnerable to typhoons.

The House of Representatives infrastructure committee opened a nationally televised hearing Tuesday. The Senate’s powerful blue ribbon committee resumed on Monday a separate inquiry, where senators grilled a private contractor who has denied any wrongdoing but faced intense questioning over her family’s fleet of at least 28 luxury cars and SUVs.

Rep. Elajiah San Fernando said that given the huge budget allocated for flood control infrastructure and water resource development in the Philippines, including more

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