MANILA - Officials of the environment, tourism and interior and local government departments on Thursday held an aerial inspection of Boracay island, currently undergoing unprecedented cleanup amid prevalent sewage problems.

The inspection came on the eve of the Senate's on-site investigation on the Department of Environment and Natural Resources' issuance of environmental compliance certificates to several establishments on the holiday island despite reported violations of environmental laws.

• Senator seeks probe on DENR permits issuance amid Boracay crackdown

DOT, DILG officials conduct an aerial survey of Boracay ahead of Senate probe pic.twitter.com/bYnz73tt3Q

— Jeff Canoy (@jeffcanoy) March 1, 2018

The Boracay cleanup came after President Rodrigo Duterte cited the island's sewage problems, calling it a "cesspool" and threatening to shut it down.

• Duterte slams Boracay as ‘cesspool,’ threatens to shut down island

Tourism Secretary Wanda Teo earlier pitched for the closure of the island during the "habagat" (southwest monsoon) season from July to October to demolish establishments that encroach the easement zone area.

The shutdown, however, is feared to leave thousands of Boracay workers jobless.

• Tourism dep't eyes closing Boracay from July to October
• How Boracay shutdown will affect local workers

-- with reports from Jeff Canoy and Sherrie Ann Torres, ABS-CBN News