Myanmar's flooding death toll rose to 74 as of Friday evening, according to a state media report on Sunday, after heavy rains triggered widespread floods across the war-torn country.

Search and rescue operations are ongoing, with at least 89 people missing as of Friday evening, the report said.

Adverse weather brought on by Typhoon Yagi, the strongest storm to hit Asia this year, has killed hundreds of people in Vietnam and Thailand, and flood waters from swollen rivers have inundated cities in both countries.

The floods, caused by heavy rains, have affected 462 villages and wards across 64 townships in Nay Pyi Taw, Bago, Mandalay and Ayeyawady regions, as well as Mon, Kayin and Shan states, according to the report.

The flooding in Myanmar began last Monday and at least 19 people had been killed by Friday morning.

Reports of more deaths and landslides have emerged, but gathering information has been challenging due to damaged infrastructure and downed phone and internet lines.

State media also reported that five dams, four pagodas and more than 65,000 houses were destroyed by the flooding.