Malaysia and Thailand are facing a second wave of heavy rain and potential flooding this week, authorities said on Monday, even as some displaced residents were able to return home and the worst floods in decades began receding in some areas.

At least 12 people have died and more than 600,000 households have been affected by the worst flooding in southern Thailand in decades, according to a government agency.

There are worries in Malaysia and neighbouring Thailand that disastrous flooding could get worse as more rain comes.

The death toll from the worst floods in decades in southern Thailand and northern Malaysia climbed to at least 12 on Saturday, authorities said, as tens of thousands of people were evacuated due to rising water levels in the past three days.

Floods in northern Malaysia and southern Thailand have claimed the lives of at least 12 people, and 135,000 individuals have been forced to leave their homes. Authorities warn that the number of casualties may increase.

Floods in the north of Malaysia and the south of Thailand have claimed at least 12 lives, and 135,000 people have had to leave their homes. Authorities warn that the death toll may rise. In Malaysia,