Tropical Cyclone Yagi and Southwest Monsoon Situation Update

11 September 2024

As of 10 September 2024, Yagi cyclone had made landfall and brought heavy rains and flooding in its path, leaving major consequences in the Philippines, Laos, Vietnam, Thailand.

AHA Situation update no.2 infographic © AHA

Impact Summary

In Lao PDR, NASA IMERG rainfall precipitation estimate shows high precipitation during the period of 8-9 September caused by the remnants of Tropical Cyclone YAGI and the Southwest Monsoon. NDMO Lao PDR reported flooding situations in Northern Lao PDR, including in Luang Prabang. Data collection and validation are ongoing by relevant government agencies in Lao PDR.

In the Philippines, as of 10 September 2024, around 2.83M people (751.6K families) have been affected by Tropical Cyclone YAGI and the Southwest Monsoon. Regions 5, 3, and NCR account for approximately 85.14% (42.39%, 32.29%, and 10.46%) of the total affected population. In terms of casualties, NDRRMC Philippines reported 20 people dead (19 for validation), 26 missing (26 for validation), and 22 injured (20 for validation) over Regions 1, 2, CALABARZON, 5, 6, 7, and 8. Regarding displaced populations, as of 10 September at 0700 HRS UTC+7, internally displaced persons within evacuation
centres are concentrated in the following areas: CALABARZON – 67.6% (14.6K persons in 161 ECs), Region 3 – 30.4% (6.6K persons in 94 ECs), NCR – 1% (208 persons in 4 ECs), Region 1 – 0.9% (205 persons in 8 ECs), Region 5 – 0.1% (21 persons in 1 EC), and CAR (5 persons in 1 EC). Regarding flood conditions, Region 3 still has approximately 198 or 54% of reported flooding areas inundated (169 areas subsided), while other regions have mostly subsided or are receding. The estimated cost of damages, including houses, agriculture, infrastructure, and other assets, stands at around 45.99M USD.

In Thailand, the combined effects of the monsoon and the tropical disturbances caused flooding and flash floods between 16 August – 9 September 2024. The widespread flooding situation extended in 26 provinces, 119 districts, 532 sub-districts, 2,811 villages. As of 9 September 2024, a total of 82,087 households (approximately 410,435 persons) were affected. A total of 24 deaths (11 flood related deaths in Chiang Rai, Phayao, Nan, Phrae, and 13 landslide related deaths in Phuket) and 19 injuries were reported by DDPM Thailand. Currently, the flooding situation persists in 6 provinces (Chiang Rai, Sukhothai, Phitsanulok, Nakhon Sawan, Ang Thong, Phra Nakhon Si Ayutthaya) 15 districts, 93 sub-districts, 422 villages with 13,010 households (estimated about 65,050 persons).

In Viet Nam, as of 10 September 2024, a total of 104 people were reportedly dead or went missing and 752 people injured in Cao Bang, Lao Cai, Quang Ninh, Hai Phong, Hai Duong, Hanoi, Hoa Binh, Yen Bai, Lang Son, Bac Giang, Tuyen Quang, Ha Giang, Lai Chau, Phu Tho, Bac Ninh, Bac Kan, Hoa Binh, Vinh Phuc, and Thanh Hoa. VDDMA Viet Nam also reported several damages to agriculture including 148.6K ha of rice, 26.2K ha of crops, 11K ha of fruit trees, and 1.6K aquaculture cages were damaged / flooded / swept away, as well as 1.1K livestock, and 680K poultry caused by Tropical Cyclone YAGI. Quang Ninh, Hai Phong, Thai Binh, Hai Duong, and Hanoi also suffered widespread power and communication outages. Due to the long duration and the
sustained intensity of YAGI, very strong gusts of wind damaged 48.34K houses, power lines and many low-voltage power poles were broken, many shops, offices, schools were damaged; many advertising signs, telecommunication poles, mobile broadcasting stations were broken; urban trees were uprooted and broken on the roads in Quang Ninh, Hai Phong, Hai Duong, Hanoi, and other provinces. According to NASA IMERG data for 1-day rainfall accumulation, several provinces including those in mountainous areas experienced heavy rainfall on 8 September: Yen Bai, Lao Cai, Lai Chau, Bac Kan, Cao Bang, Tuyen Quang, and Ha Giang.

Click here to see the full situation update by the AHA Centre:

AHA Situation Update No.2 – Tropical Cyclone Yagi and SouthWest Monsoon

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Plan International is closely monitoring the situation

The scale of the disaster in the affected countries still aligned with Orange 1 alert in Plan International. Plan International offices are actively monitoring the situation and supporting the respective governments’ response plan.