BANGKOK — Floods and landslides in Myanmar triggered by last week’s Typhoon Yagi and seasonal monsoon rains have claimed at least 226 lives, with 77 people missing, state-run media reported Tuesday. The new figures push the total number of dead in Southeast Asia from the storm past 500.

The accounting of casualties has been slow, in part due to communication difficulties with the affected areas. Myanmar is wracked by a civil war that began in 2021 after the army seized power from the elected government of Aung San Suu Kyi. Independent analysts believe the ruling military controls much less than half of the country’s territory.

Typhoon Yagi earlier hit Vietnam, northern Thailand and Laos, killing almost 300 people in Vietnam, 42 in Thailand and four in Laos, according to the ASEAN Coordinating Center for Humanitarian Assistance. It said 21 people were killed in the Philippines, with another 26 missing.

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Widespread Flooding Affects Hundreds of Thousands

The U.N. Office for the Coordination of Humanitarian Affairs, said on Monday that an estimated 631,000 people may have been affected by flooding across Myanmar. There were already 3.4 million displaced people in Myanmar at the beginning of September, according to the U.N. refugee agency, mostly because of war and unrest in recent years.

Heavy rains from the typhoon and the seasonal monsoon brought widespread flash floods to Myanmar, especially the central regions of Mandalay, Magway, Bago and the Ayeyarwaddy Delta; the eastern states Shan, Kayah, Kayin and Mon; and the country’s capital, Naypyitaw.

Some flooded areas have started to see water levels recede but others in the Shan and Kayah states remain critical.

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Extensive Damage to Infrastructure and Agriculture

More than 160,000 houses have been damaged and 438 temporary relief camps have been opened for more than 160,000 flood victims, Myanma Alinn reported. The military government announced that nearly 240,000 people have been displaced.

Myanma Alinn said 117 government offices and buildings, 1,040 schools, 386 religious buildings, roads, bridges, power towers, and telecom towers were damaged by the floods in 56 townships.

It also said nearly 130,000 animals were killed and more than 259,000 hectares (640,000 acres) of agricultural land were damaged by the floods.

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Urgent Needs and Challenges in Relief Efforts

The U.N.’s humanitarian affairs agency said food, drinking water, medicine, clothes, dignity kits, and shelters are urgent needs for the flood victims but alleviation efforts are hampered by blocked roads, damaged bridges and ongoing armed clashes.

Vice Senior Gen. Soe Win, the second-ranking member of Myanmar’s ruling military council, said the country had received relief aid from other countries, and some humanitarian assistance from the Association of Southeast Asia, will arrive soon.

Soe Win, speaking at a meeting of the National Disaster Management Committee on Monday, said that the extent of flooding in the capital was unprecedented, and cleaning and rehabilitation activities in the flooded areas began Thursday as the water level declined.

Myanmar experiences extreme weather during the monsoon virtually every year. In 2008, Cyclone Nargis killed more than 138,000 people around the Irrawaddy River delta. The then-military government was harshly discredited when it delayed acceptance of outside aid.