This aerial photo taken on November 26, 2025 shows flood waters submerging vehicles in Hat Yai in Thailand`s southern Songkhla province. (Photo by AFP

Authorities say the death toll from days of devastating flooding across large swathes of Southeast Asia rose to at least 321 on Friday.

Large parts of Indonesia, Malaysia, and Thailand have been stricken by cyclone-fuelled torrential rain for a week.

Suharyanto, the head of Indonesia`s disaster mitigation agency, said on Friday at a press briefing that at least 174 people were confirmed dead on badly hit Sumatra island.

At least 79 people were still missing and thousands of families have been displaced, he added.

Authorities say the toll could grow as rescuers reach isolated areas.

Residents in Sumatra`s Padang Pariaman region, where a total of 22 people died, had to cope with shortage of supplies and had still not been reached by search-and-rescue personnel on Friday.

In the town of Batang Toru, in northern Sumatra, residents on Friday buried seven unclaimed victims in a mass grave.

Abdul Muhari, spokesman for Indonesia`s national disaster mitigation agency said communications remained down in some parts of the island, and authorities were working to restore power and clear roads that had been blocked by landslide debris.

Indonesia would continue to airlift aid and rescue personnel into stricken areas on Friday, he added.

Separately, the Thai government said that 145 people had been killed by floods across eight southern provinces.

It said a total of more than 3.5 million people had been affected.

In the southern city of Hat Yai, the hardest-hit part of Thailand, the rain had finally stopped on Friday, but residents were still ankle-deep in flood waters and many remained without electricity.

In neighboring Malaysia, where two people have been confirmed dead, tropical storm Senyar made landfall at around midnight and has since weakened.

A total of 30,000 evacuees remain in shelters, down from more than 34,000 on Thursday.

Malaysia`s Foreign Ministry said on Friday that it had already evacuated 1,459 Malaysian nationals stranded in more than 25 flood-hit hotels in Thailand

The ministry added that it would work to rescue the remaining 300 still caught up in flood zones.

Another 56 people were killed by a cyclone in the South Asian island nation of Sri Lanka, authorities said.

In Sri Lanka, record floods and landslides have killed 56 people. Cyclone Ditwah swept through the island nation on Friday, bringing more rain.

Rescue operations are ongoing in many of these places, but power cuts, mudslides and road blockages have hampered some search efforts