Malaysia, Indonesia and Thailand faced large-scale devastation after a rare tropical storm formed in the Straits of Malacca fuelling heavy rains and wind gusts for a week.
There were 336 dead in Indonesia, 170 in Thailand, and two deaths reported in Malaysia.
Rescue and relief officials were still trying to get access to many flood-hit areas on Sunday even as flood waters receded, and tens of thousands people were evacuated across the three countries.
Over 4 million people have been affected — nearly 3 million in southern Thailand and 1.1 million in western Indonesia – according to official statistics.
Separately, across the Bay of Bengal, another 153 people were killed by a cyclone in Sri Lanka, authorities said, with 191 others missing and more than half a million affected nationwide.
Indonesia
In Indonesia, relief and rescue teams used helicopters to deliver aid to people they could not access because of blocked roads on the western island of Sumatra, where three provinces had been devastated by landslides and floods after the rains.
From a navy chopper flying over the isolated town of Palembayan in West Sumatra, a Reuters photographer saw large tracts of land and homes swept away by floodwaters. As the helicopter landed in a soccer field, dozens of people were already standing close by waiting for food.
There have been reports of people looting supply lines as they grow desperate for relief in other areas, officials said on Saturday.
“The water just rose up into the house and we were afraid, so we fled. Then we came back on Friday, and the house was gone, destroyed,” Afrianti, 41, told Reuters in Padang.
She and her family of nine have made their own tent shelter beside the single wall that remains of their home.
“My home and business are gone, the shop is gone. Nothing remains. I can only live near this one remaining wall,” she said.
According to official figures, 289 people were still reported missing and 213,000 displaced.
Thailand and Malaysia
Thailand’s ministry of public health reported the death toll from flooding in southern Thailand at 170, an increase of eight from Saturday, and 102 injuries. Songkhla province had the highest number of fatalities at 131.
Hatyai, the largest city in Songkhla, received 335mm of rain last Friday, its highest single-day tally in 300 years, amid days of downpours.
In Malaysia, meteorological authorities lifted tropical storm and continuous rain warnings on Saturday, forecasting clear skies for most of the country, after parts of the country were battered last week by heavy rain and wind.
The foreign ministry said it had evacuated more than 6,200 Malaysians stranded in Haytai and other parts of Songkhla.