Severe floods caused by monsoon rains have killed more than 30 people and displaced tens of thousands in Malaysia and southern Thailand, with both countries preparing shelters and evacuation plans in anticipation of more heavy rain.

The devastation extends beyond Malaysia, with neighbouring Thailand also grappling with the aftermath of heavy rainfall. Flooding in southern Thailand has claimed 25 lives and affected over 300,000 households, with thousands of people still staying in shelters.

Severe floods caused by monsoon rains killed more than 30 people and displaced tens of thousands in Malaysia and southern Thailand, officials said Tuesday, with both countries preparing shelters and evacuation plans in anticipation of more heavy rain.

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 13 people died and tens of thousands evacuated in one of the worst floods in decades to batter southern Thailand and northern Malaysia.

The National Disaster Command Center online portal said Friday that 84,597 people, from more than 25,000 families, across seven states were evacuated to 488 temporary shelters.

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.